Split out the ethernet API surface and use framework-connectivity-t

Ethernet framework and service source code is going to be moved to
Connectivity mainline module, this CL contains below corresponding
changes to adapt the migration in f/b side:

1. Split out ethernet module-lib APIs to Connectivity module.
   Add the ethernet resource filegroup to tiramisu-updatable-sources
   filegroup as well, build them together. Also update the module-lib
   and system api txt to reflect the APIs change. Remove the hidden
   APIs which are moved to Connectivity module. This removal fixes the
   api inconsistent issue with Tethering/apex/hidden/.

2. Remove EthernetService from SystemServer which will be registered
   from ConnectivityServiceInitializer.

3. Replace the BackgroundThread class(imported from f/b/core/java)
   with the one in the modules-utils-backgroundthread lib, which is
   visible to Connectivity module.

Bug: 210586283
Test: m
Test: atest FrameworksNetTests EthernetServiceTests
Change-Id: I1956848d3248cc56e9841d221e5e4c160bed65a4

1 files changed, 0 insertions, 9 deletions

diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index c8eaa23ed11d..f7c66c5cff69 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -293,8 +293,6 @@ public final class SystemServer implements Dumpable {
             "com.android.server.wifi.p2p.WifiP2pService";
     private static final String LOWPAN_SERVICE_CLASS =
             "com.android.server.lowpan.LowpanService";
-    private static final String ETHERNET_SERVICE_CLASS =
-            "com.android.server.ethernet.EthernetService";
     private static final String JOB_SCHEDULER_SERVICE_CLASS =
             "com.android.server.job.JobSchedulerService";
     private static final String LOCK_SETTINGS_SERVICE_CLASS =
@@ -1995,13 +1993,6 @@ public final class SystemServer implements Dumpable {
                 t.traceEnd();
             }
 
-            if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET) ||
-                    mPackageManager.hasSystemFeature(PackageManager.FEATURE_USB_HOST)) {
-                t.traceBegin("StartEthernet");
-                mSystemServiceManager.startService(ETHERNET_SERVICE_CLASS);
-                t.traceEnd();
-            }
-
             t.traceBegin("StartPacProxyService");
             try {
                 pacProxyService = new PacProxyService(context);