Remove framework-connectivity-annotations library

This library can be removed because the annotations are no longer
used out of module.

@RestrictBackgroundStatus and @MultipathPreference are defined
in connectivity mainline module. Annotate these in non-updatable
platform is not going to be manageable long term. For example,
if the module gets updated and the annotation gets more values
then it's a problem in non-updatable platform. So, it should
not have IntDef cross module boundaries.

Ignore-AOSP-First: AOSP doesn't include this change yet
Bug: 183972925
Test: build
Change-Id: I63f1fde73c4ffdaff9fda914e33cbb5a110ba64e
diff --git a/framework/src/android/net/ConnectivitySettingsManager.java b/framework/src/android/net/ConnectivitySettingsManager.java
index ae1a8a0..5f7f539 100644
--- a/framework/src/android/net/ConnectivitySettingsManager.java
+++ b/framework/src/android/net/ConnectivitySettingsManager.java
@@ -27,7 +27,7 @@
 import android.annotation.SystemApi;
 import android.content.ContentResolver;
 import android.content.Context;
-import android.net.ConnectivityAnnotations.MultipathPreference;
+import android.net.ConnectivityManager.MultipathPreference;
 import android.os.Process;
 import android.os.UserHandle;
 import android.provider.Settings;