build(android): Build AGP matrix against compileSdk 37

The AGP compatibility matrix builds the UI test app against compileSdk
37 with older AGP versions (8.7.0/8.8.0/8.9.0). Those versions predate
API 37: they neither auto-download platforms;android-37 (failing
minifyReleaseWithR8 with "Failed to find Platform SDK") nor recognize
the compileSdk (emitting an unsupported-compileSdk warning).

Install the platform explicitly in the matrix workflow so the build can
resolve it, and set android.suppressUnsupportedCompileSdk=37 to silence
the warning across the Android builds.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: runningcode

.github/workflows/agp-matrix.yml

@@ -73,6 +73,11 @@ jobs:
           disk-size: 4096M
           script: echo "Generated AVD snapshot for caching."
 
+      # The AGP versions in this matrix predate compileSdk 37 and won't
+      # auto-download the platform, so install it explicitly before building.
+      - name: Install compileSdk platform
+        run: echo "y" | "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" "platforms;android-37"
+
       # Clean, build and release a test apk
       - name: Make assembleUiTests
         run: make assembleUiTests

gradle.properties

@@ -12,6 +12,10 @@ org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled
 android.useAndroidX=true
 android.experimental.lint.version=8.13.1
 
+# Let AGP versions that predate compileSdk 37 build against it instead of failing
+# to provision platforms;android-37 (needed by the AGP compatibility matrix)
+android.suppressUnsupportedCompileSdk=37
+
 # Release information
 versionName=8.47.0