feat(manifest): fixing pr comments

Author: milos1290

AndroidSDK/src/com/leanplum/LeanplumCloudMessagingProvider.java

@@ -35,6 +35,11 @@
 abstract class LeanplumCloudMessagingProvider {
   private static String registrationId;
 
+  /**
+   * Gets the registration Id associated with current messaging provider.
+   *
+   * @return Registration Id.
+   */
   static String getCurrentRegistrationId() {
     return registrationId;
   }

AndroidSDK/src/com/leanplum/LeanplumFcmProvider.java

@@ -37,10 +37,12 @@
  */
 class LeanplumFcmProvider extends LeanplumCloudMessagingProvider {
 
+  @Override
   public String getRegistrationId() {
     return FirebaseInstanceId.getInstance().getToken();
   }
 
+  @Override
   public boolean isInitialized() {
     return true;
   }
@@ -83,6 +85,7 @@ public boolean isManifestSetup() {
     return true;
   }
 
+  @Override
   public void unregister() {
     try {
       FirebaseInstanceId.getInstance().deleteInstanceId();

AndroidSDK/src/com/leanplum/LeanplumGcmProvider.java

@@ -66,6 +66,7 @@ public void storePreferences(Context context) {
         Constants.Defaults.PROPERTY_SENDER_IDS, senderIds);
   }
 
+  @Override
   public String getRegistrationId() {
     String registrationId = null;
     try {
@@ -107,6 +108,7 @@ public String getRegistrationId() {
     return registrationId;
   }
 
+  @Override
   public boolean isInitialized() {
     return senderIds != null || getCurrentRegistrationId() != null;
   }
@@ -161,6 +163,7 @@ public boolean isManifestSetup() {
     return false;
   }
 
+  @Override
   public void unregister() {
     try {
       InstanceID.getInstance(Leanplum.getContext()).deleteInstanceID();

AndroidSDK/src/com/leanplum/LeanplumManualProvider.java

@@ -29,14 +29,17 @@
  * @author Anna Orlova
  */
 public class LeanplumManualProvider extends LeanplumCloudMessagingProvider {
+
   LeanplumManualProvider(Context context, String registrationId) {
     onRegistrationIdReceived(context, registrationId);
   }
 
+  @Override
   public String getRegistrationId() {
     return getCurrentRegistrationId();
   }
 
+  @Override
   public boolean isInitialized() {
     return true;
   }
@@ -46,6 +49,7 @@ public boolean isManifestSetup() {
     return true;
   }
 
+  @Override
   public void unregister() {
   }
 }

AndroidSDK/src/com/leanplum/internal/LeanplumManifestHelper.java

@@ -223,13 +223,19 @@ public static boolean checkComponent(ApplicationComponent componentType, String
         List<ResolveInfo> components = (componentType == ApplicationComponent.RECEIVER)
             ? context.getPackageManager().queryBroadcastReceivers(new Intent(action), 0)
             : context.getPackageManager().queryIntentServices(new Intent(action), 0);
+        if (components == null) {
+          return false;
+        }
         boolean foundComponent = false;
         for (ResolveInfo component : components) {
+          if (component == null) {
+            continue;
+          }
           ComponentInfo componentInfo = (componentType == ApplicationComponent.RECEIVER)
               ? component.activityInfo : component.serviceInfo;
-          if (componentInfo.name.equals(name)) {
+          if (componentInfo != null && componentInfo.name.equals(name)) {
             // Only check components from our package.
-            if (componentInfo.packageName.equals(packageName)) {
+            if (componentInfo.packageName != null && componentInfo.packageName.equals(packageName)) {
               foundComponent = true;
             }
           }