audio: Set slient persist property according to ringer mode

Update the persist.sys.silent property when setting ringer mode.
This property could be used by the native layer application.
Example:
Bootanimation could check this property to decide whether
background music is needed.

Change-Id: I64311fcac9d4c3729b38fc2b597dc478d6de4d7c
Audio: Fix title of system ringtone contains messy meta

Title in the Meta information of Bootest.ogg contains
junk characters which is displayed in Settings->Sound-
>Phone ringtones.

Correct the binary file to solve this issue.

Change-Id: I91c0519bb55ee5e74f783b0c147acbde641f6502
CRs-Fixed: 569976