Fix assertion failures caused by different instance type

onAttachFragment() with ReportFragment instance is called first since
Support Library 26.1.0 has been applied. Remove assert() and check
instance to fix crash caused by the ReportFragement.

Test: Manual

Change-Id: I5a4d6bdd00ac94c5892527f5fe784b8f19701214
Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>

src/com/android/messaging/ui/BlockedParticipantsActivity.java

@@ -16,12 +16,10 @@
 
 package com.android.messaging.ui;
 
-import android.app.Fragment;
 import android.os.Bundle;
 import android.view.MenuItem;
 
 import com.android.messaging.R;
-import com.android.messaging.util.Assert;
 
 /**
  * Show a list of currently blocked participants.
@@ -36,11 +34,6 @@ public class BlockedParticipantsActivity extends BugleActionBarActivity {
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
     }
 
-    @Override
-    public void onAttachFragment(final Fragment fragment) {
-        Assert.isTrue(fragment instanceof BlockedParticipantsFragment);
-    }
-
     @Override
     public boolean onOptionsItemSelected(final MenuItem item) {
         switch (item.getItemId()) {

src/com/android/messaging/ui/VCardDetailActivity.java

@@ -37,11 +37,13 @@ public class VCardDetailActivity extends BugleActionBarActivity {
 
     @Override
     public void onAttachFragment(final Fragment fragment) {
-        Assert.isTrue(fragment instanceof VCardDetailFragment);
-        final Uri vCardUri = getIntent().getParcelableExtra(UIIntents.UI_INTENT_EXTRA_VCARD_URI);
-        Assert.notNull(vCardUri);
-        final VCardDetailFragment vCardDetailFragment = (VCardDetailFragment) fragment;
-        vCardDetailFragment.setVCardUri(vCardUri);
+        if (fragment instanceof VCardDetailFragment) {
+            final Uri vCardUri =
+                    getIntent().getParcelableExtra(UIIntents.UI_INTENT_EXTRA_VCARD_URI);
+            Assert.notNull(vCardUri);
+            final VCardDetailFragment vCardDetailFragment = (VCardDetailFragment) fragment;
+            vCardDetailFragment.setVCardUri(vCardUri);
+        }
     }
 
     @Override