Keyguard: give the Keyguard a non-empty app label

A blank app label under "Apps" looks suspicious to
the untrained eye.

Change-Id: Ic679e5d6d825a83a8f666bb7e6429bebf1280f6d
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit 9757a1db0c4e60ce85fe93573c2da62bf3880231)
(cherry picked from commit fcb30b1b51cce7bb5d0fea8621a3a2b2f9784963)
Download: add to support pause/resume download by manual

We add pause and resume API here so that application can
pause and resume downloads manually by DownloadManager.
This contains two points:
1. add pause and resume download APIs.
2. add another paused reason for this download status.

Change-Id: I606b48ca20f43bcc6c119683818c2ab6ff03bfe5
(cherry picked from commit 56f9cde8c6df4de83505413233812db896379d10)