Add IScheduleTest for VTS libhwbinder scheduler test

Add IScheduleTest.hal:
    send(cfg, callerSta)
cfg: 1 for verbose output
caller_status:  (caller_rt_priority <<16 )| caller_cpu

with the return value defined as:
((1 if no priority inheritance)<<16) | (1 if no cpu sync)
The implementation is in ScheduleTest.cpp

Bug:36705188
Test: sailfish/prebuilt kernel/oc-dev with the libhwbinder_latency
  vts test case
Merged-In: Ie2a837c8d0d4fa95c6fd0ebd50e76412cb808df8

Change-Id: Ic0498bc2b036cedced906963bb8e489dcca47a1a