fix: Use the correct colour for the status bar

Previously, in `MainActivity` and `AccountActivity` the status bar would
be `colorPrimaryDark`.

Adjust the layouts and code so that `colorSurface` is used to match
the toolbar colour.

Fixes #79

app/src/main/java/app/pachli/components/account/AccountActivity.kt

@@ -203,7 +203,7 @@ class AccountActivity :
     private fun loadResources() {
         toolbarColor = MaterialColors.getColor(this, com.google.android.material.R.attr.colorSurface, Color.BLACK)
         statusBarColorTransparent = getColor(R.color.transparent_statusbar_background)
-        statusBarColorOpaque = MaterialColors.getColor(this, androidx.appcompat.R.attr.colorPrimaryDark, Color.BLACK)
+        statusBarColorOpaque = toolbarColor
         avatarSize = resources.getDimension(R.dimen.account_activity_avatar_size)
         titleVisibleHeight = resources.getDimensionPixelSize(R.dimen.account_activity_scroll_title_visible_height)
     }

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

@@ -4,8 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/mainDrawerLayout"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:fitsSystemWindows="true">
+    android:layout_height="match_parent">
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:id="@+id/mainCoordinatorLayout"