[fenix] Remove hidden fab in tabs tray (https://github.com/mozilla-mobile/fenix/pull/16972)

app/src/main/java/org/mozilla/fenix/tabtray/TabTrayView.kt

@@ -7,6 +7,8 @@ package org.mozilla.fenix.tabtray
 import android.content.Context
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.INVISIBLE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
 import android.view.accessibility.AccessibilityEvent
 import androidx.annotation.IdRes
@@ -125,12 +127,12 @@ class TabTrayView(
         }
         behavior.addBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
             override fun onSlide(bottomSheet: View, slideOffset: Float) {
-                if (interactor.onModeRequested() is Mode.Normal && !hasAccessibilityEnabled) {
+                if (
-                    if (slideOffset >= SLIDE_OFFSET) {
+                    interactor.onModeRequested() is Mode.Normal &&
-                        fabView.new_tab_button.show()
+                    !hasAccessibilityEnabled &&
-                    } else {
+                    slideOffset >= SLIDE_OFFSET
-                        fabView.new_tab_button.hide()
+                ) {
-                    }
+                    fabView.new_tab_button.show()
                 }
             }
 
@@ -312,7 +314,7 @@ class TabTrayView(
         }
 
         infoBanner?.apply {
-            view.infoBanner.visibility = View.VISIBLE
+            view.infoBanner.visibility = VISIBLE
             showBanner()
         }
     }
@@ -579,9 +581,9 @@ class TabTrayView(
         }
 
         view.tabsTray.visibility = if (hasNoTabs) {
-            View.INVISIBLE
+            INVISIBLE
         } else {
-            View.VISIBLE
+            VISIBLE
         }
 
         counter_text.text = updateTabCounter(browserState.normalTabs.size)

app/src/main/res/layout/component_tabstray_fab.xml

@@ -2,7 +2,8 @@
    - License, v. 2.0. If a copy of the MPL was not distributed with this
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
-<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton xmlns:android="http://schemas.android.com/apk/res/android"
+<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/new_tab_button"
     style="@style/TabTrayFab"