lockscreen: new Ring style - overlay (4/3)

Introduces a new Ring style - 2 rings on left/right to unlock/silence.
1 ring in the middle to launch up to 4 custom apps.
Rings can be dragged anywhere on lockscreen - not just in one direction.
Unlock/silence rings are triggered by dragging the ring far enough away from its neutral posi$
Custom apps are triggered by releasing the middle ring while over the app icon.

Demo video: http://www.youtube.com/watch?v=VnQzT9QyJFQ

Change-Id: I7cbc02de5eb23f786bc7419d3506e2f2bc7d1819

overlay/ldpi/frameworks/base/core/res/res/layout/keyguard_screen_tab_unlock.xml

@@ -199,6 +199,14 @@
             android:layout_alignParentBottom="true"
             />
 
+        <com.android.internal.widget.RingSelector
+            android:id="@+id/ring_selector"
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_alignParentBottom="true"
+            />
+
         <!-- emergency call button shown when sim is PUKd and tab_selector is
              hidden -->
         <Button

overlay/ldpi/packages/apps/Phone/res/layout-mdpi/incall_touch_ui.xml

@@ -48,6 +48,15 @@
         android:layout_alignParentBottom="true"
         />
 
+    <!-- (1) incomingCallWidget: the UI displayed while an incoming call is ringing. -->
+    <com.android.internal.widget.RingSelector
+        android:id="@+id/incomingRingSelectorCallWidget"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        android:layout_alignParentBottom="true"
+        />
+
     <!--
         (2) inCallControls: the widgets visible while a regular call
         (or calls) is in progress

overlay/ldpi/packages/apps/Phone/res/layout/incall_touch_ui.xml

@@ -48,6 +48,15 @@
         android:layout_alignParentBottom="true"
         />
 
+    <!-- (1) incomingCallWidget: the UI displayed while an incoming call is ringing. -->
+    <com.android.internal.widget.RingSelector
+        android:id="@+id/incomingRingSelectorCallWidget"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        android:layout_alignParentBottom="true"
+        />
+
     <!--
         (2) inCallControls: the widgets visible while a regular call
         (or calls) is in progress

overlay/ldpi/packages/apps/Phone/res/layout/incall_touch_ui_left.xml

@@ -48,6 +48,15 @@
         android:layout_alignParentBottom="true"
         />
 
+    <!-- (1) incomingCallWidget: the UI displayed while an incoming call is ringing. -->
+    <com.android.internal.widget.RingSelector
+        android:id="@+id/incomingRingSelectorCallWidget"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        android:layout_alignParentBottom="true"
+        />
+
     <!--
         (2) inCallControls: the widgets visible while a regular call
         (or calls) is in progress