Add clang-format (#1086)

Co-authored-by: mwilsnd <mwilsnd@gmail.com>

platform/android/src/attach_env.cpp

@@ -9,14 +9,14 @@ UniqueEnv AttachEnv() {
     jint err = theJVM->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6);
 
     switch (err) {
-    case JNI_OK:
-        return UniqueEnv(env, JNIEnvDeleter(*theJVM, false));
-    case JNI_EDETACHED:
-        return UniqueEnv(jni::AttachCurrentThread(*theJVM).release(), JNIEnvDeleter(*theJVM, true));
-    default:
-        throw std::system_error(err,  jni::ErrorCategory());
+        case JNI_OK:
+            return UniqueEnv(env, JNIEnvDeleter(*theJVM, false));
+        case JNI_EDETACHED:
+            return UniqueEnv(jni::AttachCurrentThread(*theJVM).release(), JNIEnvDeleter(*theJVM, true));
+        default:
+            throw std::system_error(err, jni::ErrorCategory());
     }
 }
 
-}
-}
+} // namespace android
+} // namespace mbgl