tree 1a71a995a706f3c1a43812423460034d71cdef75
parent 16a72c83e1ee4550cf106c455b8924c0877bf9f8
author Yifan Hong <elsk@google.com> 1510095554 -0800
committer Yifan Hong <elsk@google.com> 1510605287 -0800

healthd: move global gHealth service pointer

... to class implementation::Health. Expose APIs
InitInstance(), GetImplmentation()
for its setter and getter.

Clients that statically links to android.hardware
.health@2.0-impl (e.g. charger, recovery)
should use InitInstance().

Test: health VTS tests
Bug: 63702641
Change-Id: I51b9b976d0b723dac1a03e5113d5d9e84300c0e9