(CarbonDelta 3/3) Add CarbonDelta repo

Rebased to account for CarbonAbout being merged first. Dammit guys :-/

(cherry picked from commit 420e1844fc991ed14b401ac88c2f06cea676ba1e)
Change-Id: I238d3cfe4469d079317e084eb15f73c5a4a34aa3
Revert "Remove qrngd"

 * Bring this back. It improves boot time on several devices. The
   built-in seeder is oneshot.

This reverts commit 89b023b691148d299bed54b5c4807cfb72e61a4f.

Change-Id: Ic9e272b7a5d797d06e9a3109328ef6aa0a13b172
Track frameworks/webview from CM.

Change-Id: I7f491807f7a3938bb989bb2cc3023f04bf3465e2