Address ANAPIC review comments

- GnssMeasurementFlags extends v1.0
- add gnssSetCapabilitiesCb_2_1

Fixes: 149501257
Test: VTS tests pass on cuttlefish
Change-Id: I21dd284297d5f458945e7b5fa5e6ed0dab6a5dde
diff --git a/gnss/2.1/IGnssCallback.hal b/gnss/2.1/IGnssCallback.hal
index f7b7477..94be915 100644
--- a/gnss/2.1/IGnssCallback.hal
+++ b/gnss/2.1/IGnssCallback.hal
@@ -36,6 +36,13 @@
     };
 
     /**
+     * Callback to inform framework of the GNSS HAL implementation's capabilities.
+     *
+     * @param capabilities Capability parameter is a bit field of the Capabilities enum.
+     */
+    gnssSetCapabilitiesCb_2_1(bitfield<Capabilities> capabilities);
+
+    /**
      * Extends a GnssSvInfo, adding a basebandCN0DbHz.
      */
     struct GnssSvInfo {