Add logic to record the version of the Godot engine for the Android platform.

platform/android/java/app/build.gradle

@@ -85,6 +85,8 @@ android {
             abiFilters export_abi_list
         }
 
+        manifestPlaceholders = [godotEditorVersion: getGodotEditorVersion()]
+
         // Feel free to modify the application id to your own.
         applicationId getExportPackageName()
         versionCode getExportVersionCode()