fix(android): include authorization exception causes

Author: bryceknz

packages/react-native-app-auth/android/src/main/java/com/rnappauth/RNAppAuthModule.java

@@ -1044,7 +1044,12 @@ private void handleAuthorizationException(final String fallbackErrorCode, final
         if (ex.getLocalizedMessage() == null) {
             promise.reject(fallbackErrorCode, ex.error, ex);
         } else {
-            promise.reject(ex.error != null ? ex.error : fallbackErrorCode, ex.getLocalizedMessage(), ex);
+            String message = ex.getLocalizedMessage();
+            if (ex.getCause() != null) {
+                message += " - Cause: " + ex.getCause().getLocalizedMessage();
+            }
+
+            promise.reject(ex.error != null ? ex.error : fallbackErrorCode, message, ex);
         }
     }