IpSecTransformState: Rename API methods and improve docs

Rename API methods and update API docs as per API
council feedbacks

Bug: 316603231
Test: make update-api && make
Change-Id: Ibb1f58792d2e40ef1084c2b532e999a516a87b37
diff --git a/framework-t/api/current.txt b/framework-t/api/current.txt
index 7cd3d4f..9ae0cf7 100644
--- a/framework-t/api/current.txt
+++ b/framework-t/api/current.txt
@@ -127,7 +127,7 @@
 
   public final class IpSecTransform implements java.lang.AutoCloseable {
     method public void close();
-    method @FlaggedApi("com.android.net.flags.ipsec_transform_state") public void getIpSecTransformState(@NonNull java.util.concurrent.Executor, @NonNull android.os.OutcomeReceiver<android.net.IpSecTransformState,java.lang.RuntimeException>);
+    method @FlaggedApi("com.android.net.flags.ipsec_transform_state") public void requestIpSecTransformState(@NonNull java.util.concurrent.Executor, @NonNull android.os.OutcomeReceiver<android.net.IpSecTransformState,java.lang.RuntimeException>);
   }
 
   public static class IpSecTransform.Builder {
@@ -145,7 +145,7 @@
     method public long getPacketCount();
     method @NonNull public byte[] getReplayBitmap();
     method public long getRxHighestSequenceNumber();
-    method public long getTimestamp();
+    method public long getTimestampMillis();
     method public long getTxHighestSequenceNumber();
     method public void writeToParcel(@NonNull android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.net.IpSecTransformState> CREATOR;
@@ -158,7 +158,7 @@
     method @NonNull public android.net.IpSecTransformState.Builder setPacketCount(long);
     method @NonNull public android.net.IpSecTransformState.Builder setReplayBitmap(@NonNull byte[]);
     method @NonNull public android.net.IpSecTransformState.Builder setRxHighestSequenceNumber(long);
-    method @NonNull public android.net.IpSecTransformState.Builder setTimestamp(long);
+    method @NonNull public android.net.IpSecTransformState.Builder setTimestampMillis(long);
     method @NonNull public android.net.IpSecTransformState.Builder setTxHighestSequenceNumber(long);
   }