Remove obsolete vdc call.

Since ca8e66a8b0f843812014a28d49208f9f6f64ecbc, init has
been handling reboots and filesystem unmounts. Remove obsolete
call to vdc...

Bug: 12504045
Change-Id: If8704ca042cb3a68857743b9973e48c52e7eb881
(cherry picked from commit 6cc5150c33ca20ed2d821e0ccb59fb1cd2567411)
Make tombstones directory to not follow symlink.

Use file descriptor to change ownership.

Change-Id: Ie6919c549885d950975a003c4009b6e185df6e64
CRs-Fixed: 600072
(cherry picked from commit 358b01c3998f1621ad859fb5f337710b0b5311eb)
system/core: Remove AID_GRAPHICS from adb groups.

Remove AID_GRAPHICS from adb access groups so that
framebuffer access is restricted.

Change-Id: I306edaa2875ebc066118bb573e551325c137415a
(cherry picked from commit 3f2d22254512a09f8f9319f5f3fdebc9d46bae16)