Emulator host will set the guest keyboard layout with boot properties based on the host keyboard layout. Also, fixed complaints in setting properties adb_enabled and install_non_market_apps. BUG: 78115103 Merged-In: Iad3750af5383ba27fbf20eb9b26652f037853f1f Change-Id: Iad3750af5383ba27fbf20eb9b26652f037853f1f Signed-off-by: Weilun Du <wdu@google.com>