Make android-gradle-incompatibility gating comment self-contained

It no longer reads as a cross-reference to the android-8-sample comment.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: f6519783-e7e9-4ddb-850f-e7b5b9f417f8

Author: redsun82

java/ql/integration-tests/java/diagnostics/android-gradle-incompatibility/test.py

@@ -1,7 +1,7 @@
 import runs_on
 
 
-# Deselected on linux-arm64: the build also fails there due to the x86_64-only aapt2 gap, which would conflate with the AGP/Gradle-incompatibility failure this test asserts.
+# Deselected on linux-arm64: there the AGP build fails because no linux-aarch64 aapt2 exists, which is unrelated to the AGP/Gradle version incompatibility this test asserts and would otherwise let it pass for the wrong reason.
 @(runs_on.x86_64 or runs_on.macos)
 def test(codeql, java, gradle_7_3, android_sdk):
     codeql.database.create(_assert_failure=True)