selinux: Fix healthd's access to /dev nodes

Our healthd's support for power-on alarms adds some steps that imply
reading files its user doesn't own. Let it.

Change-Id: I3d4735aaab8fbec7acc460f812bc21f1dfa516ab
cm: sepolicy: Add contexts for cm recovery

 * Allow setup of secure adb (setup_adbd)

 * minivold in recovery

Change-Id: Id1243154f4016b59e54890404cadea46a2aad212

Conflicts:
	sepolicy/sepolicy.mk
selinux: Add a rule to label the extended keyhandler dex files

These should be treated as regular dex cache files, but they're
expanded outside of the normal cache dir

Change-Id: Id046e1b90116b35d2e7817ed4717fcef78135f08

Conflicts:
	sepolicy/file_contexts
Allow SystemServer to set service.adb.tcp.* properties

Required for network adb enable/disable to function

Change-Id: I3e2aacb6b8e9b107dcd229187a5dd76128e20001

Conflicts:
	sepolicy/sepolicy.mk
vendor: add policies for netd

Required due to CAF's abc9c0f4fe574ee9847f118e5d2ae8c530bac650 in
system/netd

Fixes showing how many devices are connected to the tethered hotspot

Change-Id: I1d83f7ac0b28efa6973e0baf429de2a398c471e3