feat(android): update build.gradle w/ namespace (#689)

* Update build.gradle

* fix typo in build.gradle

Author: 1nspir3d

android/build.gradle

@@ -24,6 +24,10 @@ if (isNewArchitectureEnabled()) {
 
 
 android {
+    def agpVersion = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION
+    if (agpVersion.tokenize('.')[0].toInteger() >= 7) {
+      namespace "com.reactnativedocumentpicker"
+    }
     compileSdkVersion getExtOrIntegerDefault('compileSdkVersion')
 
     // Used to override the NDK path/version on internal CI or by allowing