Backed out 2 changesets (bug 827158) because I forgot to rename the files properly

Backed out changeset 4b3fc69a1893 (bug 827158)
Backed out changeset a1c95996fc3e (bug 827158)
Bug 827212 - Patch 1: Move functions from public to private in BluetoothHfpManager, r=echou
Bug 827212 - Patch 2: Support feature 'Enhanced call status indications', r=echou