prefer becomeFirstResponder

Feels a little more reasonable than interecepting canBecomeFirstResponder

// FREEBIE

Signal/src/ViewControllers/ConversationView/OWSMessagesComposerTextView.m

@@ -11,10 +11,17 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (BOOL)canBecomeFirstResponder
 {
+    return YES;
+}
+
+- (BOOL)becomeFirstResponder
+{
+    BOOL becameFirstResponder = [super becomeFirstResponder];
+    if (becameFirstResponder) {
         // Intercept to scroll to bottom when text view is tapped.
         [self.textViewPasteDelegate textViewDidChangeSize];
-
-    return YES;
+    }
+    return becameFirstResponder;
 }
 
 - (BOOL)pasteboardHasPossibleAttachment