Update build.gradle (#104)

Issue with the Spotless plugin due to the jCenter repository being sunsetted. so remove the JCenter() from gradle.build

Author: KartikDevarde2601

android/build.gradle

@@ -1,7 +1,7 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+         mavenCentral()
     }
 
     dependencies {
@@ -59,7 +59,6 @@ android {
 
 repositories {
     google()
-    jcenter()
     mavenCentral()
 }