App 2.24.1: remove the header line above the pages

The title and subtitle above every tab are gone; the pages start at
the top and gain about 45 dp. Their strings are removed. Emulator only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

app/src/main/res/layout-w1000dp/activity_main.xml

@@ -16,12 +16,6 @@
             </LinearLayout>
         </ScrollView>
         <LinearLayout android:layout_width="0dp" android:layout_weight="1" android:layout_height="match_parent" android:orientation="vertical">
-            <!-- One compact line: the Overview has to fit the car's 1778×720 px window (about 640 dp for
-                 layouts). Version, update check and About are on the Settings tab. -->
-            <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center_vertical" android:baselineAligned="true" android:paddingStart="24dp" android:paddingEnd="24dp" android:paddingTop="10dp" android:paddingBottom="2dp">
-                <TextView android:id="@+id/header_title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/design_overview_title" android:textAppearance="@style/Text.EV.Title" android:textSize="24sp" android:maxLines="1" />
-                <TextView android:id="@+id/header_subtitle" android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:layout_marginStart="16dp" android:text="@string/design_overview_subtitle" android:textAppearance="@style/Text.EV.Secondary" android:maxLines="1" android:ellipsize="end" />
-            </LinearLayout>
             <androidx.viewpager2.widget.ViewPager2 android:id="@+id/content" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" />
         </LinearLayout>
     </LinearLayout>