Migration to Material Components theme and style.

New night theme mainly white on black.
Fixes #1122.
Fixes #957.

src/main/res/layout/custom_layout_item.xml

@@ -3,7 +3,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    style="@style/StatsCardView">
+    style="@style/OpenTracksCardView">
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
@@ -16,7 +16,7 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             tools:text="Profile/Custom Layout Title"
-            style="@style/LargeLabel"
+            style="@style/TextAppearance.OpenTracks.PrimaryHeader"
             android:layout_margin="8dp"
             app:layout_constraintHorizontal_chainStyle="packed"
             app:layout_constraintStart_toStartOf="parent"