Add BIND_IMPORTANT to @BindServiceFlags

bindService calls passing BIND_IMPORTANT is being flagged
as invalid in Android Studio because our tools metadata
(derived from @BindServiceFlags) does not know that BIND_IMPORTANT
(and BIND_ADJUST_WITH_ACTIVITY) are allowed.

https://code.google.com/p/android/issues/detail?id=81489

Change-Id: Ifad899f581f01c96bff46e304013219b80710c87

core/java/android/content/Context.java

@@ -145,13 +145,14 @@ public abstract class Context {
     /** @hide */
     @IntDef(flag = true,
             value = {
-                BIND_AUTO_CREATE,
                 BIND_AUTO_CREATE,
                 BIND_DEBUG_UNBIND,
                 BIND_NOT_FOREGROUND,
                 BIND_ABOVE_CLIENT,
                 BIND_ALLOW_OOM_MANAGEMENT,
-                BIND_WAIVE_PRIORITY
+                BIND_WAIVE_PRIORITY,
+                BIND_IMPORTANT,
+                BIND_ADJUST_WITH_ACTIVITY
             })
     @Retention(RetentionPolicy.SOURCE)
     public @interface BindServiceFlags {}