Themes: Find wp asset when APK has dir entries

Some APKs are compiled with folders included as zip entries in the APK. This was causing
lockscreen wp to not correctly be set.

Change-Id: I9eca7878b29e3cfcb43abc4a9dab084d9c200b83
Catch all exceptions when retrieving ComposedIconInfo

It is possible to receive a TransactionTooLargeException when
getting the composed icon info from the package manager service.
We should catch these exceptions to avoid unnecessary crashes.

For reference:
The Binder transaction buffer has a limited fixed size, currently 1Mb,
which is shared by all transactions in progress for the process.
Consequently this exception can be thrown when there are many transactions
in progress even when most of the individual transactions are of moderate size.

see http://developer.android.com/reference/android/os/TransactionTooLargeException.html
for more details.

Change-Id: I70d35dc4926125bfbef5d8c5fb8ed6d6fcdbf159
Add SET_WALLPAPER permission to SystemUI

If an exception is thrown in updateWallpaperLocked, a call to
WallpaperManager.clear() is made.  This requires the SET_WALLPAPER
permission and will throw a SecurityException if that permission
is not granted to SystemUI.

Change-Id: I61811b65dcfe8b15f0e9030f7aa6d1dc09cea351
Themes: Add STYLE_THUMBNAIL to PreviewColumns

Change-Id: Ie18264cbede92220335400428e67735866cd442d
Themes: Add helper methods for creating complete component maps

These methods can be used to apply a theme while replacing any
components not found in the theme with the defaults.

Default components come from the default theme for the system
with any missing components in that default theme coming from HOLO.

Change-Id: Idea55cc684ccc8304b01a991c36b6993f55b8880