ci(android): Bump Maestro to 2.7.0 for UI critical tests (#5798)

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: