chore: update Braintree Android SDK to v4

android/build.gradle

@@ -1,23 +1,23 @@
 buildscript {
     repositories {
-        jcenter()
         google()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:7.3.1'
     }
 }
 
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 28
-    buildToolsVersion '28.0.3'
+    compileSdkVersion 33
+    buildToolsVersion '33.0.1'
 
     defaultConfig {
         minSdkVersion 21
-        targetSdkVersion 27
+        targetSdkVersion 33
         versionCode 1
         versionName "1.0"
     }
@@ -32,10 +32,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'com.braintreepayments.api:google-payment:3.2.0'
-    implementation 'com.google.android.gms:play-services-wallet:16.0.1'
-    implementation 'com.braintreepayments.api:data-collector:2.+'
-    implementation 'com.braintreepayments.api:drop-in:5.+'
+    implementation 'com.braintreepayments.api:drop-in:6.6.0'
     implementation 'com.facebook.react:react-native:+'
 }