Upgrade gradle plugin (#1936)

Summary:
Upgraded to the latest Android Studio and this popped up.

Pull Request resolved: https://github.com/facebook/flipper/pull/1936

Test Plan:
Built the sample app.

Repro'd the previous build failure. Weirdly enough, this only occurred on Linux, not on my Mac. Now it's passing.

Reviewed By: mweststrate

Differential Revision: D26483694

Pulled By: passy

fbshipit-source-id: 9c27eb6d28a0f390154899d67469a504d68c2ad4

android/build.gradle

@@ -60,9 +60,10 @@ android {
 
     dependencies {
         compileOnly deps.proguardAnnotations
-        implementation 'com.facebook.fbjni:fbjni:0.0.2'
-        extractHeaders 'com.facebook.fbjni:fbjni:0.0.2:headers'
-        extractJNI 'com.facebook.fbjni:fbjni:0.0.2'
+        // Temporary until we upgrade to prefabs: https://developer.android.com/studio/releases/gradle-plugin#native-dependencies
+        implementation 'com.facebook.fbjni:fbjni-java-only:0.0.4'
+        extractHeaders 'com.facebook.fbjni:fbjni:0.0.4:headers'
+        extractJNI 'com.facebook.fbjni:fbjni:0.0.4'
         implementation deps.soloader
         implementation deps.jsr305
         implementation deps.supportAppCompat