PL2: Override platform version to 16.1.0

* That way we can have TWRP that decrypts userdata
  on more than just <= Android 9.

Change-Id: I0d18187b13c2b5a1a9a5a592010b604c57543c03

BoardConfig.mk

@@ -59,6 +59,7 @@ TARGET_BOARD_PLATFORM := sdm660
 TARGET_BOARD_PLATFORM_GPU := qcom-adreno508
 
 # Encryption
+PLATFORM_VERSION := 16.1.0
 PLATFORM_SECURITY_PATCH := 2025-12-31
 
 # Partitions