SystemUI: redraw navbar icons, add custom navbar icons back

Patchset: add sw600dp versions

Patchset: finish up the rest of the custom icons

Change-Id: I0925fe7a348a8914757caaca6c97d85fb7337f7b

(cherry picked from commit f2164f98294f9cc7f2d24abb388b7a62e2318742)

(cherry picked from commit 57c943d06f2964afef6b87877fa766d564b1753e)

(cherry picked from commit 64b6139e06975bd9e4f3cc8d6f9093d11cd75ae9)

(cherry picked from commit 2f900fcda09cfc1c738f45764c65b4eac78415cb)

(cherry picked from commit 8fe8b6b09c41912f57f9a76d5749f492e72be721)
StopSwitchDelay - Remove 5s Delay To Open Apps After Pressing Home Button

Conflicts:
	services/java/com/android/server/am/ActivityManagerService.java

Change-Id: I86b882244dc5e240a2e94d651fa5366c43919dee

(cherry picked from commit 6b51aa63f416cf5d1269055be010fee912824501)

(cherry picked from commit 22edad0fdf92733b3e94965cc39be89123d878a7)

(cherry picked from commit 83ef509cde02f62953858ed61611c22df7fe4d46)

(cherry picked from commit 36483f62ca220c01012b69f125c84c46f470b289)

(cherry picked from commit d8e7d48fefc5daaaf0cfeeb8a20acf74002b5865)