restore android gradle to default

Author: ksog66

build.gradle

@@ -11,7 +11,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.0-beta05'
+        classpath "com.android.tools.build:gradle:7.0.0-alpha02"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong
@@ -28,4 +28,4 @@ allprojects {
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
+}