Perform build check on push, move Gradle wrapper validation into build action

.github/workflows/build_check.yml

@@ -1,5 +1,5 @@
-name: Pull request build check
-on: [pull_request]
+name: Build check
+on: [push, pull_request]
 
 jobs:
   build:
@@ -8,11 +8,16 @@ jobs:
     steps:
       - name: Clone repo
         uses: actions/checkout@v2
+
+      - name: Validate Gradle Wrapper
+        uses: gradle/wrapper-validation-action@v1
+
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:
           java-version: 1.8
       - name: Install NDK
-        run: sudo ${ANDROID_HOME}/tools/bin/sdkmanager --install "ndk;21.0.6113669"
-      - name: Build project
-        run: ./gradlew assembleDebug
+        run: sudo ${ANDROID_HOME}/tools/bin/sdkmanager --install "ndk;21.0.6113669" &> /dev/null
+
+      - name: Build app
+        run: ./gradlew assembleStandardDebug

.github/workflows/gradle-wrapper-validation.yml

@@ -1,11 +0,0 @@
-name: Validate Gradle Wrapper
-on: [push, pull_request]
-
-jobs:
-  validation:
-    name: Validation
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: gradle/wrapper-validation-action@v1