Build ethernet framework source into framework-connectivity-tiramisu

- move ethernet APIs, build it into framework-connectivity-tiramisu
- start ethernet service from ConnectivityServiceInitializer
- fix EthernetManager dependnecy in Tethering module
- fix EthernetNetworkSpecifier dependency in framework-connectivity
- fix the ethernet related config resource

Bug: 210586283
Test: m
Test: atest FrameworksNetTests EthernetServiceTests
Change-Id: I54857b8517649048a343c72797668394d5225766
Merged-In: I54857b8517649048a343c72797668394d5225766
diff --git a/framework-t/Android.bp b/framework-t/Android.bp
index 2ab69b8..f46d887 100644
--- a/framework-t/Android.bp
+++ b/framework-t/Android.bp
@@ -127,6 +127,7 @@
         "//frameworks/base/tests/vcn",
         "//frameworks/libs/net/common/testutils",
         "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/net/ethernet/tests:__subpackages__",
         "//frameworks/opt/telephony/tests/telephonytests",
         "//packages/modules/CaptivePortalLogin/tests",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",