fix(test): Dismiss ANR dialog in Maestro tests before each flow

The Pixel Launcher can become unresponsive on CI emulators,
showing a system dialog that blocks Maestro from interacting
with the app under test.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: romtsn

sentry-android-integration-tests/sentry-uitest-android-critical/maestro/.maestro/config.yaml

@@ -1,3 +1,9 @@
 platform:
   android:
     disableAnimations: true
+onFlowStart:
+  - runFlow:
+      when:
+        visible: "Close app"
+      commands:
+        - tapOn: "Close app"