docs(in-app-messaging, android): note android gradle plugin 3.5.4 is minimum

3.5.3, which comes default with [email protected] still, has AAPT failures

Author: mikehardy

.spellcheck.dict.txt

@@ -50,6 +50,7 @@ Firestore
 GDPR
 globals
 Gradle
+gradle
 Hesp
 Homebrew
 HTTP

docs/in-app-messaging/usage/index.md

@@ -24,6 +24,8 @@ yarn add @react-native-firebase/in-app-messaging
 cd ios/ && pod install
 ```
 
+Note: in-app-messaging requires a minimum android gradle plugin version of 3.5.4 to compile or you will see `AAPT` errors regarding unexpected XML with `<queries>` elements. However, `[email protected]` still ships with a default of 3.5.3. If you have not already, you must update the line `classpath("com.android.tools.build:gradle:3.5.3")`in `android/build.gradle` to a minimum of `3.5.4` for android builds to work.
+
 If you're using an older version of React Native without autolinking support, or wish to integrate into an existing project,
 you can follow the manual installation steps for [iOS](/in-app-messaging/usage/installation/ios) and [Android](/in-app-messaging/usage/installation/android).