Merge pull request #9636 from mpizza/ce_audio

Bug 855792 - CE requirement on maximum volume, r=alive, a=blocking-b2g:tef+(cherry picked from commit 0e887e03411e76a46fce7b1e2f46c54265a90cae)
Merge pull request #9633 from steveck-chung/settings-mms-panel

Bug 842251 - [Settings]Configurable requisition for delivery report at sending messages. r=arthur.chen(cherry picked from commit 65a0f833064dbff4efc8210c86291897e9a9724e)