Add GnssAssistanceInterface AIDL HAL

Test: atest VtsHalGnssTargetTest
Bug: 358381377

Change-Id: I18419f56b253013f59b848a66f3cd9b7605ca187
diff --git a/gnss/aidl/Android.bp b/gnss/aidl/Android.bp
index 47fc3af..6e159a1 100644
--- a/gnss/aidl/Android.bp
+++ b/gnss/aidl/Android.bp
@@ -30,6 +30,7 @@
         "android/hardware/gnss/*.aidl",
         "android/hardware/gnss/measurement_corrections/*.aidl",
         "android/hardware/gnss/visibility_control/*.aidl",
+        "android/hardware/gnss/gnss_assistance/*.aidl",
     ],
     stability: "vintf",
     backend: {
@@ -56,6 +57,6 @@
         },
 
     ],
-    frozen: true,
+    frozen: false,
 
 }