Deps: Replace eventbus dependency with eventbus java

Removing the 'eventbus' dependency wasn't enough by itself as the build
was then failing. Adding the transient 'eventbus-java' dependency was
actually required in order to make the build successful again.

------------------------------------------------------------------------

This replacement was suggested by the dependency analysis report,
see below:

Unused dependencies which should be removed:
  implementation 'org.greenrobot:eventbus:3.3.1'

These transitive dependencies should be declared directly:
  ...
  implementation 'org.greenrobot:eventbus-java:3.3.1'
  ...

WordPressUtils/build.gradle

@@ -15,7 +15,7 @@ dependencies {
     implementation "com.google.android.material:material:$materialVersion"
     implementation "androidx.swiperefreshlayout:swiperefreshlayout:$androidxSwipeRefreshLayoutVersion"
     implementation "androidx.recyclerview:recyclerview:$androidxRecyclerViewVersion"
-    implementation "org.greenrobot:eventbus:$eventBusVersion"
+    implementation "org.greenrobot:eventbus-java:$eventBusVersion"
 
     implementation "androidx.core:core:$androidxCoreVersion"