Support API 30 system images and add API 30 to workflow. Update build tools to 30.0.0. Update test projec’s compileSdk and targetSdk to API 30.

test-fixture/app/build.gradle

@@ -3,13 +3,13 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion "29.0.3"
+    compileSdkVersion 30
+    buildToolsVersion "30.0.0"
 
     defaultConfig {
         applicationId "com.example.testapp"
         minSdkVersion 15
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
 

test-fixture/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip