Migrate jcenter to mavenCentral

[Why]
JFrog made JCenter a read-only repository on March 31, 2021.

[How]
Migrate JCenter to Maven Central.
Reference: https://developer.android.com/build/jcenter-migration

android/build.gradle

@@ -9,7 +9,7 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.0'
@@ -21,7 +21,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }