New sensor HAL and test

Change-Id: I216e3dd0b2b45829fef7c682774d2cdd8271d4e7
diff --git a/tests/Android.mk b/tests/Android.mk
new file mode 100644
index 0000000..5053e7d
--- /dev/null
+++ b/tests/Android.mk
@@ -0,0 +1 @@
+include $(call all-subdir-makefiles)