Revert "Detach engines before destroying WallpaperService"

This reverts commit 31c9bf477024e96849b9f0c43140e9647269a138.
Revert "Update thumbnail when file is updated"

This reverts commit 4e8f54f1a8d88ae4cadd17ec350dbba6400c5a00.
Revert "NsdService: Clear client info after resolution request is serviced."

This reverts commit 3917de5d918a1d3d43dad7b710433d410dfaeb34.
Revert "TextToSpeech memory leak"

This reverts commit 31cb2a48f580b9eb638070ec425cb4a60137ba08.
Revert "Fixed a leaked partial wakelock in AbstractThreadedSyncAdapter."

This reverts commit 015e4aac5cea4d39d134420ac06be39fe13f6805.
Revert "Remove unnecessary reference in PackageManagerService"

This reverts commit f0e1ba4caba29c939176c2e33d472ea9a799b378.
Revert "Airplane mode is shown in status bar."

This reverts commit 13a29b5f2783419d86d7fc5ccca6b8f95e8fbf53.