s4-common: Import init.target.rc

Change-Id: I4eb845afab0d7aad2df1c31d7c4c1e4369966e5c
s4-common: Enable legacy mmap for rmt_storage

Change-Id: I1646e677502ed2a87aa86b5c10006da4a006ac3d
s4-common: Fix camera wrapper build for lollipop

Change-Id: I7bb182b5225f14c12f5de59a88e3905550810833
s4-common: General cleanup

* Reorganize properties and flags alphabetically
* Split system properties into separate file

Change-Id: I72b267ff2afac8e9493591496d385f7d1a67a255