Torch: set default hasHighBrightness flag to false

Most devices don't support this, better to be
opt-in.

Change-Id: I4efabeb56672e631e72f738b117a18474276db1e
Signed-off-by: Roman Birg <roman@cyngn.com>
Torch: fix xhdpi notification icon

This one is white and matches the other density
buckets.

Change-Id: I8d646d3a5a1a869d13b67e5967aed2baccd2adfd
Signed-off-by: Roman Birg <roman@cyngn.com>