Add Hinge Angle Sensor to default impl for HAL 2.1

Bug: 144139857
Test: Verify this type is exposed when VTS is run
Change-Id: I994f1b4c77729b76760b7cafc19b825c98ca97ca
diff --git a/sensors/common/default/2.X/Android.bp b/sensors/common/default/2.X/Android.bp
index ea75a10..8b0d52f 100644
--- a/sensors/common/default/2.X/Android.bp
+++ b/sensors/common/default/2.X/Android.bp
@@ -26,6 +26,7 @@
     shared_libs: [
         "android.hardware.sensors@1.0",
         "android.hardware.sensors@2.0",
+        "android.hardware.sensors@2.1",
         "libcutils",
         "libfmq",
         "libhidlbase",