m7-common: Remove deprecated flags

Change-Id: Ibb68790574bbbd2ebe8b3fd0f25b96381d6e3b8c
m7-common: Reset file mode on init.qcom.usb.rc

Change-Id: I1e1437eb7c36f97bdf94dba0e1a34452710966a2
m7-common: Import init.target.rc

* init no longer performs this by default, import it manually.

Change-Id: Ic00fa3e2d7a68308b73312356e013796aa0ec299
m7-common: Fix camera compilation for lollipop

Change-Id: I14fa14b2730fc801aaed44829b94e4d6dc71ba59
m7-common: General cleanup

* Reorganize properties and flags alphabetically
* Split system properties into separate file

Change-Id: I6b214c369fbf8bc9d230984a842591916d3f7e64
m7-common: Disable unimplemented overlay options

Change-Id: I4fa9659b9642b9933e302b5bb7397a875abd15aa