flounder: Enable Sensor HAL for flounder

Review: https://partner-android-review.googlesource.com/#/c/49928

Change-Id: Icfb28181611934580d47225e654ecaa528500200
diff --git a/device.mk b/device.mk
index fdf3c8b..5293499 100644
--- a/device.mk
+++ b/device.mk
@@ -135,7 +135,8 @@
 
 PRODUCT_PACKAGES += \
     power.flounder \
-    lights.flounder
+    lights.flounder \
+    sensors.flounder
 
 # Filesystem management tools
 PRODUCT_PACKAGES += \