[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/16603: Disable pull down when in fullscreen (https://github.com/mozilla-mobile/fenix/pull/17314)

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -668,7 +668,7 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler,
                     .collect { tab -> pipModeChanged(tab) }
             }
 
-            view.swipeRefresh.isEnabled = shouldPullToRefreshBeEnabled()
+            view.swipeRefresh.isEnabled = shouldPullToRefreshBeEnabled(false)
 
             if (view.swipeRefresh.isEnabled) {
                 val primaryTextColor =
@@ -798,10 +798,10 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler,
     }
 
     @VisibleForTesting
-    internal fun shouldPullToRefreshBeEnabled(): Boolean {
+    internal fun shouldPullToRefreshBeEnabled(inFullScreen: Boolean): Boolean {
         return FeatureFlags.pullToRefreshEnabled &&
                 requireContext().settings().isPullToRefreshEnabledInBrowser &&
-                !(requireActivity() as HomeActivity).isImmersive
+                !inFullScreen
     }
 
     private fun initializeEngineView(toolbarHeight: Int) {
@@ -1229,6 +1229,8 @@ abstract class BaseBrowserFragment : Fragment(), UserInteractionHandler,
                 initializeEngineView(toolbarHeight)
             }
         }
+
+        activity?.swipeRefresh?.isEnabled = shouldPullToRefreshBeEnabled(inFullScreen)
     }
 
     /*

app/src/test/java/org/mozilla/fenix/browser/BrowserFragmentTest.kt

@@ -287,22 +287,18 @@ class BrowserFragmentTest {
 
     @Test
     fun `WHEN isPullToRefreshEnabledInBrowser is disabled THEN pull down refresh is disabled`() {
-        every { homeActivity.isImmersive } returns false
         every { context.settings().isPullToRefreshEnabledInBrowser } returns true
-        assert(browserFragment.shouldPullToRefreshBeEnabled())
+        assert(browserFragment.shouldPullToRefreshBeEnabled(false))
 
         every { context.settings().isPullToRefreshEnabledInBrowser } returns false
-        assert(!browserFragment.shouldPullToRefreshBeEnabled())
+        assert(!browserFragment.shouldPullToRefreshBeEnabled(false))
     }
 
     @Test
-    fun `WHEN in immersive mode THEN pull down refresh is disabled`() {
-        every { homeActivity.isImmersive } returns false
+    fun `WHEN in fullscreen THEN pull down refresh is disabled`() {
         every { context.settings().isPullToRefreshEnabledInBrowser } returns true
-        assert(browserFragment.shouldPullToRefreshBeEnabled())
-
-        every { homeActivity.isImmersive } returns true
-        assert(!browserFragment.shouldPullToRefreshBeEnabled())
+        assert(browserFragment.shouldPullToRefreshBeEnabled(false))
+        assert(!browserFragment.shouldPullToRefreshBeEnabled(true))
     }
 
     private fun addAndSelectTab(tab: TabSessionState) {