Upgrade to gradle 7.0.2

PiperOrigin-RevId: 388929850

build.gradle

@@ -17,7 +17,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.1'
+        classpath 'com.android.tools.build:gradle:7.0.0'
         classpath 'com.google.android.gms:strict-version-matcher-plugin:1.2.2'
     }
 }

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-6.9-all.zip
+distributionUrl=https://services.gradle.org/distributions/gradle-7.0.2-all.zip