[FRP] Theming for Pattern and Password screens

Basic theming for pattern and password screens. Create subclasses for
ChooseLockPassword and ChooseLockPattern, and copied their XML
layouts.

This CL mainly uses the buttons in the original screens as-is, with a
follow-up CL coming to change to use the nav bar buttons.

Bug: 18482708
Change-Id: I81751f781de633aff23fc68657589360007c235a

src/com/android/settings/ChooseLockPassword.java

@@ -61,7 +61,7 @@ public class ChooseLockPassword extends SettingsActivity {
     @Override
     public Intent getIntent() {
         Intent modIntent = new Intent(super.getIntent());
-        modIntent.putExtra(EXTRA_SHOW_FRAGMENT, ChooseLockPasswordFragment.class.getName());
+        modIntent.putExtra(EXTRA_SHOW_FRAGMENT, getFragmentClass().getName());
         return modIntent;
     }
 
@@ -84,6 +84,10 @@ public class ChooseLockPassword extends SettingsActivity {
         return false;
     }
 
+    /* package */ Class<? extends Fragment> getFragmentClass() {
+        return ChooseLockPasswordFragment.class;
+    }
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         // TODO: Fix on phones
@@ -200,8 +204,12 @@ public class ChooseLockPassword extends SettingsActivity {
         @Override
         public View onCreateView(LayoutInflater inflater, ViewGroup container,
                 Bundle savedInstanceState) {
+            return inflater.inflate(R.layout.choose_lock_password, container, false);
+        }
 
-            View view = inflater.inflate(R.layout.choose_lock_password, null);
+        @Override
+        public void onViewCreated(View view, Bundle savedInstanceState) {
+            super.onViewCreated(view, savedInstanceState);
 
             mCancelButton = (Button) view.findViewById(R.id.cancel_button);
             mCancelButton.setOnClickListener(this);
@@ -254,8 +262,6 @@ public class ChooseLockPassword extends SettingsActivity {
                 CharSequence title = getText(id);
                 sa.setTitle(title);
             }
-
-            return view;
         }
 
         @Override