Bump core from 0.13.0 to 0.15.0

Bumps [core](https://github.com/facebook/screenshot-tests-for-android) from 0.13.0 to 0.15.0.
- [Release notes](https://github.com/facebook/screenshot-tests-for-android/releases)
- [Changelog](https://github.com/facebook/screenshot-tests-for-android/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/screenshot-tests-for-android/compare/0.13.0...0.15.0)

---
updated-dependencies:
- dependency-name: com.facebook.testing.screenshot:core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -359,7 +359,7 @@ dependencies {
     androidTestImplementation "net.bytebuddy:byte-buddy-android:$byteBuddyVersion"
     androidTestImplementation "io.mockk:mockk-android:$mockkVersion"
     androidTestImplementation 'androidx.arch.core:core-testing:2.0.1'
-    androidTestImplementation "com.facebook.testing.screenshot:core:0.13.0"
+    androidTestImplementation "com.facebook.testing.screenshot:core:0.15.0"
 
     // UIAutomator - for cross-app UI tests, and to grant screen is turned on in Espresso tests
     // androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'