Make tethering module to use netd_aidl_interface-unstable-java

Use unstable aidl for new api tetherOffload* and modified
parcel TetherStatsParcel in BpfCoordinator{, Test}.

Bug: 150736748
Test: m

Change-Id: I2d2cedf560319653f67f6b06f7abb0bf66eba91a
diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 33c2b58..4116afc 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -25,7 +25,7 @@
     ],
     static_libs: [
         "androidx.annotation_annotation",
-        "netd_aidl_interface-V3-java",
+        "netd_aidl_interface-unstable-java",
         "netlink-client",
         "networkstack-aidl-interfaces-java",
         "android.hardware.tetheroffload.config-V1.0-java",