Add FlpHal layer to support Location Batching.

Android.mk

...ava/android/hardware/location/IFusedLocationHardware.aidl

...android/hardware/location/IFusedLocationHardwareSink.aidl

location/java/android/location/FusedBatchOptions.aidl

location/java/android/location/FusedBatchOptions.java

location/java/android/location/IFusedGeofenceHardware.aidl

location/java/android/location/IFusedProvider.aidl

.../com/android/location/provider/FusedLocationHardware.java

.../android/location/provider/FusedLocationHardwareSink.java

...lib/java/com/android/location/provider/FusedProvider.java

...a/com/android/location/provider/GmsFusedBatchOptions.java

services/java/com/android/server/LocationManagerService.java

...java/com/android/server/location/FlpHardwareProvider.java

.../android/server/location/FusedLocationHardwareSecure.java

services/java/com/android/server/location/FusedProxy.java

services/jni/Android.mk

...s/jni/com_android_server_location_FlpHardwareProvider.cpp

services/jni/onload.cpp