Update GitHub actions

* Don't run check_license for PRs
* Only run lint for release builds

.github/workflows/check_license.yml

@@ -6,8 +6,6 @@ name: Check licenses
 on:
   push:
     branches: [ main ]
-  pull_request:
-    branches: [ main ]
 
 jobs:
   build:

.github/workflows/lint.yml

@@ -20,4 +20,4 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle
-      run: ./gradlew lint
+      run: ./gradlew :app:lintGenericRelease :app:lintGoogleplayRelease