Bump androidx.annotation:annotation in /python-for-android/dists/kolibri

Bumps androidx.annotation:annotation from 1.7.1 to 1.9.1.

---
updated-dependencies:
- dependency-name: androidx.annotation:annotation
  dependency-version: 1.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

python-for-android/dists/kolibri/build.gradle

@@ -107,7 +107,7 @@ android {
 dependencies {
     implementation 'com.android.support:support-v4:28.0.0'
     implementation 'com.android.support:multidex:1.0.3'
-    implementation 'androidx.annotation:annotation:1.7.1'
+    implementation 'androidx.annotation:annotation:1.9.1'
     implementation 'androidx.concurrent:concurrent-futures:1.1.0'
     implementation 'androidx.work:work-runtime:2.9.0'
     implementation 'androidx.work:work-multiprocess:2.9.0'