Spotbugs: remove superclass field masking fields inherited from BaseActivity

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/java/com/nextcloud/talk/activities/CallActivity.java

@@ -178,14 +178,13 @@ public class CallActivity extends CallBaseActivity {
 
     @Inject
     NcApi ncApi;
-    @Inject
-    EventBus eventBus;
+
     @Inject
     UserManager userManager;
-    @Inject
-    AppPreferences appPreferences;
+
     @Inject
     Cache cache;
+
     @Inject
     PlatformPermissionUtil permissionUtil;