MediaScanner: delete abnormal elements in prescan procedure.

There is a race in MediaProvider's mUnmountReciver.
when it doing external storage's database clean up at power down procedure,
if the datebase is big, system may shutdown after db.update, but db.delete
not done, there will be many elements with no filename in the database.
That may cause duplicated files and folders shown in MTP.

This patch clean up these abnormal elements in MediaScanner's prescan procedure.

Change-Id: I0a3dacffd12892b1a2a892b2749a02ab3dea109b
Author: Liang Wang <liangx.wang@intel.com>
Signed-off-by: Liang Wang <liangx.wang@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 58969
Fix for breakText returning count of glyphs not chars.

Paint.breakText should return the number of characters measured to a given maxWidth, but it returns the number of glyphs instead. The solution loops through the advances and whenever if finds an advance with length bigger than 0 decrements it until reaching zero or the end of the advances. The advance has a zero when a glyphs is for more than on character, for the subsequent characters. The width of the glyphs is added at the first character.

Change-Id: If26fca3a08133d08572dfda1e33536cc0bd8b1e5
add reply.writeNoException() for quick response

In case of SET_ACTIVITY_CONTROLLER_TRANSACTION, there is no reply transaction.
So makes same to other transactions.

Change-Id: I3b9527682662a12f78cc96b6084904f18178fee7
Audio: Fix abnormal keytone playback during silent mode changing

Change-Id: Icfc4003c9756b3c33578c137e59dc4a2b4f25647
Author: Chenyang Du <chenyang.du@intel.com>
Signed-off-by: Ertao Zhao <ertaox.zhao@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 19084 4898