Add default impl of Sensors HAL 2.1

Create a default implementation of HAL 2.1 that shares 90% of the
underlying code with HAL 2.0 since the interfaces are very similar.

Bug: 144139857
Test: compile
Change-Id: Ic6b139df98ddb1f92833b1f2d65e1cecc297fd41
diff --git a/sensors/2.1/default/android.hardware.sensors@2.1-service-mock.rc b/sensors/2.1/default/android.hardware.sensors@2.1-service-mock.rc
new file mode 100644
index 0000000..d4147e7
--- /dev/null
+++ b/sensors/2.1/default/android.hardware.sensors@2.1-service-mock.rc
@@ -0,0 +1,7 @@
+service vendor.sensors-hal-2-1-mock /vendor/bin/hw/android.hardware.sensors@2.1-service.mock
+    interface android.hardware.sensors@2.0::ISensors default
+    interface android.hardware.sensors@2.1::ISensors default
+    class hal
+    user system
+    group system
+    rlimit rtprio 10 10