manifest: switch to omni external/skia

Change-Id: I95ac5a4cfd723c091ae0efae455476f524a7cee4

omni-aosp.xml

@@ -36,6 +36,7 @@
   <project path="external/mksh" name="android_external_mksh" remote="omnirom" revision="android-9.0" />
   <project path="external/tinycompress" name="android_external_tinycompress" remote="omnirom" revision="android-9.0" />
   <project path="external/selinux" name="android_external_selinux" remote="omnirom" revision="android-9.0" />
+  <project path="external/skia" name="android_external_skia" remote="omnirom" revision="android-9.0" />
   <project path="external/toybox" name="android_external_toybox" remote="omnirom" revision="android-9.0" />
 
   <project path="frameworks/av" name="android_frameworks_av" remote="omnirom" revision="android-9.0" />

remove.xml

@@ -65,6 +65,7 @@
   <remove-project name="platform/external/mksh" />
   <remove-project name="platform/external/tinycompress" />
   <remove-project name="platform/external/selinux" />
+  <remove-project name="platform/external/skia" />
   <remove-project name="platform/external/toybox" />
 
   <remove-project name="platform/frameworks/av" />