Lint - avoid calling a restricted API.

src/org/thoughtcrime/securesms/ConversationListFragment.java

@@ -133,8 +133,8 @@ public class ConversationListFragment extends Fragment
     emptyImage   = ViewUtil.findById(view, R.id.empty);
     emptySearch  = ViewUtil.findById(view, R.id.empty_search);
 
-    if (archive) fab.setVisibility(View.GONE);
-    else         fab.setVisibility(View.VISIBLE);
+    if (archive) fab.hide();
+    else         fab.show();
 
     reminderView.setOnDismissListener(() -> updateReminders(true));
 

src/org/thoughtcrime/securesms/components/webrtc/WebRtcCallScreen.java

@@ -118,7 +118,7 @@ public class WebRtcCallScreen extends FrameLayout implements RecipientModifiedLi
 
   public void setIncomingCall(Recipient personInfo) {
     setCard(personInfo, getContext().getString(R.string.CallScreen_Incoming_call));
-    endCallButton.setVisibility(View.INVISIBLE);
+    endCallButton.hide();
     incomingCallButton.setVisibility(View.VISIBLE);
     incomingCallButton.startRingingAnimation();
   }
@@ -141,7 +141,7 @@ public class WebRtcCallScreen extends FrameLayout implements RecipientModifiedLi
     this.untrustedIdentityExplanation.setText(spannableString);
     this.untrustedIdentityExplanation.setMovementMethod(LinkMovementMethod.getInstance());
 
-    this.endCallButton.setVisibility(View.INVISIBLE);
+    this.endCallButton.hide();
   }
 
   public void setIncomingCallActionListener(WebRtcAnswerDeclineButton.AnswerDeclineListener listener) {