vibrator: add initial forcefeedback vibrator HAL

This HAL talks to vibrators which are exposed as input devices using the
forcefeedback API.

This version includes lots of debugging spam.
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index 7c5f8e4..2472171 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -6,6 +6,7 @@
 /dev/dri				u:object_r:dri_device:s0
 /dev/dri/card0				u:object_r:graphics_device:s0
 /dev/dri/renderD128			u:object_r:gpu_device:s0
+/dev/input/.*               u:object_r:input_device:s0
 /dev/qcom_rmtfs_mem1			u:object_r:rmtfs_device:s0
 /dev/ttyMSM0				u:object_r:console_device:s0
 
@@ -28,6 +29,7 @@
 
 /vendor/bin/hw/android\.hardware\.gatekeeper@1\.0-service\.software			u:object_r:hal_gatekeeper_default_exec:s0
 /vendor/bin/hw/android\.hardware\.graphics\.allocator@4\.0-service\.minigbm_msm		u:object_r:hal_graphics_allocator_default_exec:s0
+/vendor/bin/hw/android\.hardware\.vibrator@1\.1-service\.sdm845		u:object_r:hal_vibrator_default_exec:s0
 /vendor/bin/hw/android\.hardware\.light@2\.0-service					u:object_r:hal_light_default_exec:s0
 /vendor/bin/pd-mapper									u:object_r:pd_mapper_exec:s0
 /vendor/bin/qrtr-cfg									u:object_r:qrtr_exec:s0