Merge commit 'f28608cdf4f6a0075d0811ccd32123baf4daec31' * commit 'f28608cdf4f6a0075d0811ccd32123baf4daec31': Fix issue 2909189: System property ro.audio.silent no longer mutes system.
Merge commit 'f28608cdf4f6a0075d0811ccd32123baf4daec31' * commit 'f28608cdf4f6a0075d0811ccd32123baf4daec31': Fix issue 2909189: System property ro.audio.silent no longer mutes system.