SystemServer: Move sensor init to a new thread.

Move Sensor init to a separate thread so that it doesn't block the
critical booting path.

Initializing Sensors in separate thread has been seen to improve boot
time on customer devices with low-tier / ult chipsets(less cpu cores)

Change-Id: I5c46a5805c04ffe551019b4683523e3bf70274a2
Framework/base: Relocating GC calls at the end of loop during zygote init

Relocating explicit GC calls at the end of the loop during the preloading
the resources and preloading clases, with this changes boottime improved.

Change-Id: I2e05ef68578eddca8cd435b5186e198ee7d71739
Disable config item to support SIM refresh for dual mode card

Set "config_sim_refresh_for_dual_mode_card" to false;
Resetting this config as majority of the targets don't
need it to be set.

Change-Id: I955fead91e4939172a478fba2b79ae11fecda82b
CRs-Fixed: 665741
Telephony: Add a config item to control fetching APN from OMH card

Change-Id: I5c14a6870ea0767cc14ff3addeeb0828cc704a32
CRs-Fixed: 748148