chore(android): drop the stale compileSdk suppression (#9)

`android.suppressUnsupportedCompileSdk=35` and its comment were left over
from AGP 8.3, which was only validated up to compileSdk 34. Both the premise
and the value are now wrong: the project is on AGP 8.13.2 and compileSdk 36,
so the property targets a version we no longer compile against, and AGP 8.13
supports 36 natively with no warning to suppress.

It was inert rather than harmful, but it read as documentation of a
constraint that no longer exists. Verified by building with it removed:
`assembleDebug` succeeds with zero untested-SDK warnings.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

Author: nseldeib

android/gradle.properties

@@ -2,6 +2,3 @@ org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 android.useAndroidX=true
 kotlin.code.style=official
 android.nonTransitiveRClass=true
-# AGP 8.3 was validated up to compileSdk 34; we compile against 35 (required by
-# Play). The build is otherwise unchanged, so silence the untested-SDK warning.
-android.suppressUnsupportedCompileSdk=35