Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference
 
Test: Presubmit
Bug: 161896447

Change-Id: I02fd71bce7deb031a3699ce79121ea4c424fac61

packages/SystemUI/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhone.java

@@ -265,7 +265,7 @@ public class HeadsUpManagerPhone extends HeadsUpManager implements Dumpable,
 
     /**
      * Set that we are exiting the headsUp pinned mode, but some notifications might still be
-     * animating out. This is used to keep the touchable regions in a sane state.
+     * animating out. This is used to keep the touchable regions in a reasonable state.
      */
     public void setHeadsUpGoingAway(boolean headsUpGoingAway) {
         if (headsUpGoingAway != mHeadsUpGoingAway) {