Revert "Trebuchet: add lockscreen wallpaper picker"

This reverts commit 29c2da02bf48fbdba977bc774027e218487e1abe.

Change-Id: Ie5addf5ac77acb6411a6f22195d8608df625462a
Trebuchet: Remove duplicate string

Change-Id: I5a1ed314ca05eb4771038c0e08c4695ed51b3f92
Trebuchet: Update default_workspace

  - Gmail has changed its className for its android.intent.category.LAUNCHER
    intent.

Change-Id: I34b1ab38696971fafb9d65fff5f3c5ce7c13eba7
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	res/layout/wallpaper_picker_clear.xml
	src/com/android/launcher3/LockWallpaperPickerActivity.java

Change-Id: Iec12b3799fd74aa0530a959338bc54aca17cd9a0