Make ContextHubClient.getId() return a 16-bit value

Limit the return value range based on feedback to reflect the 16-bit
value returned from the framework.

Fixes: 214028356
Test: None
Change-Id: Idaecebd9219e38fd5e04122043274b8a524d8bae

core/api/system-current.txt

@@ -4121,7 +4121,7 @@ package android.hardware.location {
   public class ContextHubClient implements java.io.Closeable {
     method public void close();
     method @NonNull public android.hardware.location.ContextHubInfo getAttachedHub();
-    method public int getId();
+    method @IntRange(from=0, to=65535) public int getId();
     method @RequiresPermission(android.Manifest.permission.ACCESS_CONTEXT_HUB) public int sendMessageToNanoApp(@NonNull android.hardware.location.NanoAppMessage);
   }
 

core/java/android/hardware/location/ContextHubClient.java

@@ -15,6 +15,7 @@
  */
 package android.hardware.location;
 
+import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
@@ -118,13 +119,14 @@ public class ContextHubClient implements Closeable {
      * is newly generated (e.g. any regeneration of a callback client, or generation
      * of a non-equal PendingIntent client), the ID will not be the same.
      *
-     * @return The ID of this ContextHubClient.
+     * @return The ID of this ContextHubClient, in the range [0, 65535].
      */
+    @IntRange(from = 0, to = 65535)
     public int getId() {
         if (mId == null) {
             throw new IllegalStateException("ID was not set");
         }
-        return mId;
+        return (0x0000FFFF & mId);
     }
 
     /**