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