Address EthernetManager javadoc review comments

Test: TH
Change-Id: Iafa8979d8e96ea4d078b017e56ee61334d33b5f5
diff --git a/framework-t/src/android/net/EthernetManager.java b/framework-t/src/android/net/EthernetManager.java
index 767b392..2b76dd9 100644
--- a/framework-t/src/android/net/EthernetManager.java
+++ b/framework-t/src/android/net/EthernetManager.java
@@ -541,8 +541,7 @@
      * Similarly, use {@link NetworkCapabilities.Builder} to build a {@code NetworkCapabilities}
      * object for this network to put inside the {@code request}.
      *
-     * This function accepts an {@link OutcomeReceiver} that is called once the operation has
-     * finished execution.
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
      *
      * @param iface the name of the interface to act upon.
      * @param request the {@link EthernetNetworkUpdateRequest} used to set an ethernet network's
@@ -583,9 +582,9 @@
     /**
      * Enable a network interface.
      *
-     * Enables a previously disabled network interface.
-     * This function accepts an {@link OutcomeReceiver} that is called once the operation has
-     * finished execution.
+     * Enables a previously disabled network interface. An attempt to enable an already-enabled
+     * interface is ignored.
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
      *
      * @param iface the name of the interface to enable.
      * @param executor an {@link Executor} to execute the callback on. Optional if callback is null.
@@ -620,10 +619,9 @@
     /**
      * Disable a network interface.
      *
-     * Disables the use of a network interface to fulfill network requests. If the interface
-     * currently serves a request, the network will be torn down.
-     * This function accepts an {@link OutcomeReceiver} that is called once the operation has
-     * finished execution.
+     * Disables the specified interface. If this interface is in use in a connected
+     * {@link android.net.Network}, then that {@code Network} will be torn down.
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
      *
      * @param iface the name of the interface to disable.
      * @param executor an {@link Executor} to execute the callback on. Optional if callback is null.