[Tether13] Move TetheringManager into framework

Move tethering out of ConnectivityService. All client would
use TetheringManager to talk with TetheringService directly.

Bug: 144320246
Test: -build, flash, boot
      -atest TetheringTests

Change-Id: Ib051bea724a256f9c4572b566e46ae7b9c4abe6e
diff --git a/services/Android.bp b/services/Android.bp
index cf0c15c..501496d 100644
--- a/services/Android.bp
+++ b/services/Android.bp
@@ -73,6 +73,7 @@
 
     libs: [
         "android.hidl.manager-V1.0-java",
+        "framework-tethering"
     ],
 
     plugins: [