Merge "Expose UserHandle.getSharedAppGid as a system API."

core/api/system-current.txt

@@ -9781,6 +9781,7 @@ package android.os {
     method @NonNull public static String formatUid(int);
     method public static int getAppId(int);
     method public int getIdentifier();
+    method public static int getSharedAppGid(int);
     method public int getUid(int);
     method @Deprecated public boolean isOwner();
     method public boolean isSystem();

core/java/android/os/UserHandle.java

@@ -404,7 +404,12 @@ public final class UserHandle implements Parcelable {
         return getUid(userId, Process.SHARED_USER_GID);
     }
 
-    /** @hide */
+    /**
+     * Returns the gid shared between all users with the app that this uid represents, or -1 if the
+     * uid is invalid.
+     * @hide
+     */
+    @SystemApi
     public static int getSharedAppGid(int uid) {
         return getSharedAppGid(getUserId(uid), getAppId(uid));
     }