Make com.android.tethering the flag container instead of system

It was set to "system" incorrectly.

Bug: 312769710
Test: m all_aconfig_declarations
      printflags | grep android.ne
Change-Id: Ie65dcb8c987cc0677b80ba9f8f84fe604ebbf1d2
diff --git a/common/FlaggedApi.bp b/common/FlaggedApi.bp
index 56625c5..21be1d3 100644
--- a/common/FlaggedApi.bp
+++ b/common/FlaggedApi.bp
@@ -17,7 +17,7 @@
 aconfig_declarations {
     name: "com.android.net.flags-aconfig",
     package: "com.android.net.flags",
-    container: "system",
+    container: "com.android.tethering",
     srcs: ["flags.aconfig"],
     visibility: ["//packages/modules/Connectivity:__subpackages__"],
 }
@@ -25,7 +25,7 @@
 aconfig_declarations {
     name: "com.android.net.thread.flags-aconfig",
     package: "com.android.net.thread.flags",
-    container: "system",
+    container: "com.android.tethering",
     srcs: ["thread_flags.aconfig"],
     visibility: ["//packages/modules/Connectivity:__subpackages__"],
 }
@@ -33,7 +33,7 @@
 aconfig_declarations {
     name: "nearby_flags",
     package: "com.android.nearby.flags",
-    container: "system",
+    container: "com.android.tethering",
     srcs: ["nearby_flags.aconfig"],
     visibility: ["//packages/modules/Connectivity:__subpackages__"],
 }