Creates a default com.android.hardware.sensors vendor APEX.

This provides the default android.hardware.sensors@2.1 implementation.

Bug: 198635611
Test: use on Cuttlefish; observe rotation is functional;
      observe dumpsys sensorservice lists the available sensors;
Change-Id: Ic6dd4ba011c4774159609864e4f55d342a16f8e3
diff --git a/sensors/2.1/default/Android.bp b/sensors/2.1/default/Android.bp
index 0be81e1..e11316b 100644
--- a/sensors/2.1/default/Android.bp
+++ b/sensors/2.1/default/Android.bp
@@ -22,6 +22,11 @@
     default_applicable_licenses: ["hardware_interfaces_license"],
 }
 
+filegroup {
+    name: "android.hardware.sensors@2.1.xml",
+    srcs: ["android.hardware.sensors@2.1.xml"],
+}
+
 cc_binary {
     name: "android.hardware.sensors@2.1-service.mock",
     defaults: ["hidl_defaults"],
@@ -50,5 +55,5 @@
         "android.hardware.sensors@1.0-convert",
         "android.hardware.sensors@2.X-shared-impl",
     ],
-    vintf_fragments: ["android.hardware.sensors@2.1.xml"],
+    vintf_fragments: [":android.hardware.sensors@2.1.xml"],
 }