Themes: Keyguard: Fix NPE setting lockscreen wallpaper

After boot the view might not be laid out and so getWidth() and
getHeight() return 0 and will cause a NullPointerException in
createBitmap().

Bug AOSPA-448

Change-Id: Ibacf4199a69709dc34d21695732c2a5360533a23
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
TextView: Check also for mLayoutParams before calling checkForRelayout

Cherry-picked from OmniROM.

http://jira.omnirom.org/browse/OMNI-976

This was introduced with
https://github.com/omnirom/android_frameworks_base/commit/b3670c54e60387fde633fb91c649c5b896f8b962

Change-Id: I06c1926c5b8102b336d128d9b411f74a9eff3ded