fix requestLayout() improperly called warning in AccountActivity (#1507)

app/src/main/java/com/keylesspalace/tusky/AccountActivity.kt

@@ -236,11 +236,18 @@ class AccountActivity : BottomSheetActivity(), ActionButtonActivity, HasAndroidI
 
         // Add a listener to change the toolbar icon color when it enters/exits its collapsed state.
         accountAppBarLayout.addOnOffsetChangedListener(object : AppBarLayout.OnOffsetChangedListener {
+            var priorOffset = 0
+
             @AttrRes
             var priorAttribute = R.attr.account_toolbar_icon_tint_uncollapsed
 
             override fun onOffsetChanged(appBarLayout: AppBarLayout, verticalOffset: Int) {
 
+                if(verticalOffset == priorOffset) {
+                    return
+                }
+                priorOffset = verticalOffset
+
                 @AttrRes val attribute = if (titleVisibleHeight + verticalOffset < 0) {
                     supportActionBar?.setDisplayShowTitleEnabled(true)