Rename two targets to have SettingsLib prefix

- Rename lib name of ActionButtonsPreference and LayoutPreference.
- Remove Settings* prefix for directory name of LayoutPreference.
The LayoutPreference is in settingslib so it's pretty clear
it's a settings widget.

Test: Rebuild
Change-Id: I8f4b8643ee4b2cb3756d1c3e82d91021916e08c2
Fixes: 120706174
diff --git a/packages/SettingsLib/Android.bp b/packages/SettingsLib/Android.bp
index cc17b25..e588e921 100644
--- a/packages/SettingsLib/Android.bp
+++ b/packages/SettingsLib/Android.bp
@@ -16,8 +16,8 @@
         "SettingsLibAppPreference",
         "SettingsLibSearchWidget",
         "SettingsLibSettingsSpinner",
-        "SettingsLayoutPreference",
-        "ActionButtonsPreference",
+        "SettingsLibLayoutPreference",
+        "SettingsLibActionButtonsPreference",
     ],
 
     // ANDROIDMK TRANSLATION ERROR: unsupported assignment to LOCAL_SHARED_JAVA_LIBRARIES