Settings: Add isPackageInstalled to Utils.java
Settings: Integrate Voice+ into Settings (1/2)

Change-Id: I4778443c219cd29a463e9c4dab60783dca251f0f
Signed-off-by: Roman Birg <roman@cyngn.com>
Settings: Remove V+ pref if V+ isn't present

Change-Id: Ia202d00ebee95e99018e7b04ef284de0bf3f1e1c