Bug 1919200 - Restore the toolbar background after the microsurvey is dismissed r=android-reviewers,twhite

Use `isMicrosurveyPromptDismissed.value` to know when either of the survey prompt
or survey options dialog was closed.
Reapplying the default background when the survey is closed will mean a small
divider line included in the background shape will also be shown.

Differential Revision: https://phabricator.services.mozilla.com/D222423

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

@@ -1541,6 +1541,8 @@ abstract class BaseBrowserFragment :
                                     },
                                 )
                             }
+                        } else {
+                            restoreBrowserToolbarAfterMicrosurveyPrompt(browserToolbar)
                         }
 
                         if (isToolbarAtBottom) {
@@ -1744,6 +1746,7 @@ abstract class BaseBrowserFragment :
         }
     }
 
+    @Suppress("LongMethod")
     private fun initializeMicrosurveyPrompt() {
         val context = requireContext()
         val view = requireView()
@@ -1799,6 +1802,8 @@ abstract class BaseBrowserFragment :
                                     },
                                 )
                             }
+                        } else {
+                            restoreBrowserToolbarAfterMicrosurveyPrompt(browserToolbar)
                         }
 
                         if (isToolbarAtBottom) {
@@ -1844,6 +1849,15 @@ abstract class BaseBrowserFragment :
         browserToolbar.elevation = 0.0f
     }
 
+    private fun restoreBrowserToolbarAfterMicrosurveyPrompt(browserToolbar: BrowserToolbar) {
+        val defaultBackground = ResourcesCompat.getDrawable(
+            resources,
+            R.drawable.toolbar_background,
+            context?.theme,
+        )
+        browserToolbar.background = defaultBackground
+    }
+
     private var currentMicrosurvey: MicrosurveyUIData? = null
 
     /**