Revert "remove qrngd"

This reverts commit 35072180e3604d029cc993c1af825f0e04ae24d3.

Change-Id: I589e6fdb0b4702c8b55ca0b47b3819db128f8e7f

Conflicts:
	d2-common.mk
d2-common: update perms

/dev/rtc0 to 0660
add perms for wcnss for the stepchildren

Change-Id: Ic73a473c2086ee531ace5a54f9fe0a85c1a8523c
d2-common: turn off continuous mode for touch

Change-Id: I4e552a1a43bdd282e2066f2f5e5d0e9e27048b83
d2-common: remove continuous-picture mode

Until we can figure out why it's crashing. The only other option is to
no-op autofocus altogether

Change-Id: I2815ef6bb2919eb47771fc4c4456351e9b9e8f7b