Migrate to mavenCentral from jcenter. (#782)

Fix for #777

* Migrate to mavenCentral from jcenter.

* Updated fresco version to 2.3.0 (Because when migrate to mavenCentral can't able to find version 2.2.0 issue arise).

Android/app/build.gradle

@@ -107,7 +107,7 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
     implementation 'androidx.recyclerview:recyclerview:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    def fresco_version = '2.2.0'
+    def fresco_version = '2.3.0'
     implementation "com.facebook.fresco:fresco:$fresco_version"
     implementation "com.facebook.fresco:webpsupport:$fresco_version"
     implementation "com.facebook.fresco:animated-webp:$fresco_version"

Android/build.gradle

@@ -4,7 +4,7 @@ buildscript {
 
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.6.2'
@@ -17,7 +17,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }