hayabusa: disbale some unimplemented overlay

Change-Id: I1fbaf632aedc6193947dafc7b43d0952a935b0c7
hayabusa: prohibit cald/camera from reading cache_data.dat

This will cause cald to be unable to initialize and camera
will stop working. Not sure why...

Change-Id: I104f2d57f1b234c209d50cfbb8cd64cf52608ed3
hayabusa: finally solved the camera fail on rebooting issue

Checked init sequence and there it is.
mediaserver is launched later than any action in on <trigger>.

Change-Id: If3a62189e70da72b5251eebab7f4343c395b2da1
hayabusa: enable multi-user support

Change-Id: I507b795654a120b648c458242ea76723df788e6f
hayabusa: fix WiFi hotspot

Don't know where to send this patch, blue-common or qcom-common?

Change-Id: I4cbf5b4ba3116dac78cee4b7f34f9a56454fd3d3
hayabusa: get rid of enable_torch overlay

Lollipop has this itself.

Change-Id: I8793ce0c82b9a4c5359753860bafcf1c407f3072