ci(android): Bump Maestro to 2.7.0 for UI critical tests

Update the pinned Maestro CLI version used by the UI critical
integration tests from 2.1.0 to the latest 2.7.0. No flow changes
are required; all commands used remain supported and the Java 17
requirement is already satisfied by the CI job.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: runningcode

.github/workflows/integration-tests-ui-critical.yml

@@ -15,7 +15,7 @@ env:
   BUILD_PATH: "build/outputs/apk/release"
   APK_NAME: "sentry-uitest-android-critical-release.apk"
   APK_ARTIFACT_NAME: "sentry-uitest-android-critical-release"
-  MAESTRO_VERSION: "2.1.0"
+  MAESTRO_VERSION: "2.7.0"
 
 jobs:
   build: