Optimize CI a bit

https://github.com/actions/checkout/releases/tag/v3.0.0
https://github.com/actions/setup-java/releases/tag/v3.0.0
https://github.com/gradle/gradle-build-action

.github/workflows/android.yml

@@ -1,16 +1,33 @@
 name: Android CI
-on: [pull_request]
+
+on:
+  pull_request:
+    paths-ignore:
+      - '.idea/**'
+      - '.gitattributes'
+      - '.github/**.json'
+      - '.gitignore'
+      - '.gitmodules'
+      - '**.md'
+      - 'LICENSE'
+      - 'NOTICE'
 
 jobs:
-  build:
-
+  validation:
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v1
-    - name: set up JDK 11
-      uses: actions/setup-java@v1
-      with:
-        java-version: 11
-    - name: Build with Gradle
-      run: ./gradlew assembleDebug ktlintCheck testsOnCi
+      - uses: actions/checkout@v3
+      - uses: gradle/wrapper-validation-action@v1
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: 17
+      - uses: gradle/gradle-build-action@v2
+        with:
+          gradle-home-cache-cleanup: true
+      - run: ./gradlew assembleDebug ktlintCheck testsOnCi

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

@@ -1,10 +0,0 @@
-name: "Validate Gradle Wrapper"
-on: [pull_request]
-
-jobs:
-  validation:
-    name: "Validation"
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: gradle/wrapper-validation-action@v1