Search for subhal .so files in additional directories

Fixes: 154634207
Test: Load onto flame and confirm that subhal .so
android.hardware.sensors@2.X-fakesubhal-config3.so loads when it is
living in the /vendor/lib64/hw directory using
adb shell lshal debug android.hardware.sensors@2.0::ISensors/default

Change-Id: I8a676b97f6f6992e8937ecf31c3b7af06e676ebb
Merged-In: I8a676b97f6f6992e8937ecf31c3b7af06e676ebb