Move adbd from root to system

Bug: 63910933
Test: normal boot sailfish, checks adb works
Test: recovery boot sailfish, checks adb works
Test: normal boot bullhead, checks adb works
Test: recovery boot bullhead, checks adb works

Change-Id: I1b27910c06a4172ca718b3344736ec8e3429f477
Merged-In: I1b27910c06a4172ca718b3344736ec8e3429f477
(cherry picked from commit 93defc17f376041437e5157a7c4d9e0344441811)
2 files changed