Add LTS-only kernel build workflows

- Added lts-kernels.yml: Reusable workflow for building all LTS kernels
- Added build-lts-only.yml: Manual trigger workflow with options to build all LTS kernels or specific ones
- Covers all LTS combinations: A12-5.10, A13-5.10/5.15, A14-5.15/6.1, A15-6.6
- Provides cleaner build names like 'LTS 5.10.X-android12'

.github/workflows/build-lts-only.yml

@@ -0,0 +1,140 @@
+name: Build LTS Kernels Only
+
+permissions:
+  contents: write  # Allow writing to repository contents
+  actions: write   # Allows triggering actions
+
+on:
+  workflow_dispatch:
+    inputs:
+      specific_kernel:
+        description: 'Build specific LTS kernel (leave empty for all)'
+        required: false
+        type: choice
+        options:
+          - ''
+          - 'android12-5.10'
+          - 'android13-5.10'
+          - 'android13-5.15'
+          - 'android14-5.15'
+          - 'android14-6.1'
+          - 'android15-6.6'
+        default: ''
+
+jobs:
+  build-all-lts:
+    if: ${{ inputs.specific_kernel == '' }}
+    name: "LTS ${{ matrix.kernel_version }}.${{ matrix.sub_level }}-${{ matrix.android_version }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Android 12 - 5.10 LTS
+          - android_version: "android12"
+            kernel_version: "5.10"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 13 - 5.10 LTS
+          - android_version: "android13"
+            kernel_version: "5.10"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 13 - 5.15 LTS
+          - android_version: "android13"
+            kernel_version: "5.15"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 14 - 5.15 LTS
+          - android_version: "android14"
+            kernel_version: "5.15"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 14 - 6.1 LTS
+          - android_version: "android14"
+            kernel_version: "6.1"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 15 - 6.6 LTS
+          - android_version: "android15"
+            kernel_version: "6.6"
+            sub_level: "X"
+            os_patch_level: "lts"
+    
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: ${{ matrix.android_version }}
+      kernel_version: ${{ matrix.kernel_version }}
+      sub_level: ${{ matrix.sub_level }}
+      os_patch_level: ${{ matrix.os_patch_level }}
+
+  build-android12-5-10-lts:
+    if: ${{ inputs.specific_kernel == 'android12-5.10' }}
+    name: "LTS 5.10.X-android12"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android12"
+      kernel_version: "5.10"
+      sub_level: "X"
+      os_patch_level: "lts"
+
+  build-android13-5-10-lts:
+    if: ${{ inputs.specific_kernel == 'android13-5.10' }}
+    name: "LTS 5.10.X-android13"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android13"
+      kernel_version: "5.10"
+      sub_level: "X"
+      os_patch_level: "lts"
+
+  build-android13-5-15-lts:
+    if: ${{ inputs.specific_kernel == 'android13-5.15' }}
+    name: "LTS 5.15.X-android13"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android13"
+      kernel_version: "5.15"
+      sub_level: "X"
+      os_patch_level: "lts"
+
+  build-android14-5-15-lts:
+    if: ${{ inputs.specific_kernel == 'android14-5.15' }}
+    name: "LTS 5.15.X-android14"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android14"
+      kernel_version: "5.15"
+      sub_level: "X"
+      os_patch_level: "lts"
+
+  build-android14-6-1-lts:
+    if: ${{ inputs.specific_kernel == 'android14-6.1' }}
+    name: "LTS 6.1.X-android14"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android14"
+      kernel_version: "6.1"
+      sub_level: "X"
+      os_patch_level: "lts"
+
+  build-android15-6-6-lts:
+    if: ${{ inputs.specific_kernel == 'android15-6.6' }}
+    name: "LTS 6.6.X-android15"
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: "android15"
+      kernel_version: "6.6"
+      sub_level: "X"
+      os_patch_level: "lts"

.github/workflows/lts-kernels.yml

@@ -0,0 +1,60 @@
+name: LTS Kernels Only
+
+permissions:
+  contents: write  # Allow writing to repository contents
+  actions: write   # Allows triggering actions
+
+on:
+  workflow_call:
+    inputs: {}
+
+jobs:
+  build-lts-kernels:
+    name: "LTS ${{ matrix.kernel_version }}.${{ matrix.sub_level }}-${{ matrix.android_version }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Android 12 - 5.10 LTS
+          - android_version: "android12"
+            kernel_version: "5.10"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 13 - 5.10 LTS
+          - android_version: "android13"
+            kernel_version: "5.10"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 13 - 5.15 LTS
+          - android_version: "android13"
+            kernel_version: "5.15"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 14 - 5.15 LTS
+          - android_version: "android14"
+            kernel_version: "5.15"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 14 - 6.1 LTS
+          - android_version: "android14"
+            kernel_version: "6.1"
+            sub_level: "X"
+            os_patch_level: "lts"
+          
+          # Android 15 - 6.6 LTS
+          - android_version: "android15"
+            kernel_version: "6.6"
+            sub_level: "X"
+            os_patch_level: "lts"
+    
+    uses: ./.github/workflows/build.yml
+    secrets: inherit
+    with:
+      android_version: ${{ matrix.android_version }}
+      kernel_version: ${{ matrix.kernel_version }}
+      sub_level: ${{ matrix.sub_level }}
+      os_patch_level: ${{ matrix.os_patch_level }}