Remove FIXME that getApnSetting should be NonNull

API Council has asked that I remove a comment suggesting that
this API be NonNull. While in theory, we should be able to
make this NonNull in the future, the tooling doesn't work in a
way that makes such a change beneficial.

Bug: 151928851
Test: compilation (comment-only change)
Merged-In: Ifd80f2859e4a090225aab1b3a483325d654a2412
Change-Id: Ifd80f2859e4a090225aab1b3a483325d654a2412
(cherry picked from commit 4005f21d68)

telephony/java/android/telephony/PreciseDataConnectionState.java

@@ -267,7 +267,6 @@ public final class PreciseDataConnectionState implements Parcelable {
      *
      * @return the ApnSetting that was used to configure this data connection.
      */
-    // FIXME: This shouldn't be nullable; update once the ApnSetting is supplied correctly
     public @Nullable ApnSetting getApnSetting() {
         return mApnSetting;
     }