Update EmulatedUserHal to use UserHalHelper native library.

Bug: 150409377
Test: Tested using lshal commands in go/user-hal-emulation.

Change-Id: I79486a715c92111d3d6f5c011b7e1cd8c5501c25
Merged-In: I4ba2202e28ef9260b38ebbf21083d55d7aa07fc9
4 files changed