fix some more gradle paths

Author: jason-simmons

testing/run_tests.py

@@ -707,7 +707,8 @@ def run_java_tests(executable_filter, android_variant='android_debug_unopt'):
       BUILDROOT_DIR, 'flutter', 'shell', 'platform', 'android', 'test_runner'
   )
   gradle_bin = os.path.join(
-      BUILDROOT_DIR, 'third_party', 'gradle', 'bin', 'gradle.bat' if is_windows() else 'gradle'
+      BUILDROOT_DIR, 'flutter', 'third_party', 'gradle', 'bin',
+      'gradle.bat' if is_windows() else 'gradle'
   )
   flutter_jar = os.path.join(OUT_DIR, android_variant, 'flutter.jar')
   android_home = os.path.join(BUILDROOT_DIR, 'flutter', 'third_party', 'android_tools', 'sdk')

testing/scenario_app/android/README.md

@@ -378,7 +378,7 @@ update it, run:
 
 ```sh
 cd testing/scenario_app/android
-$ENGINE_SRC/third_party/gradle/bin/gradle app:dependencies --write-locks
+$ENGINE_SRC/flutter/third_party/gradle/bin/gradle app:dependencies --write-locks
 ```
 
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