Parameter to hide bottom affordances

Created configurable xml parameter to hide the mic/phone
affordance at the bottom of the lock screen, fixed minor
animation issue where circle would still expand if affordance
isn't visible and set default visibility to false.

Test: Double tap to open camera from AoD, lock screen and launcher
Test: visual, set config, look at lock screen
Bug: 64155983
Change-Id: If5cd2c2c369578480c0ad4e8a98970bcfabd5f3e