Minamp 1.6: adjustable UI size, larger text and controls

- New setting "Text and button size" (Normal / Large / Extra large): scales
  text, icons and buttons on top of the phone's density (App.UI_SCALES)
- Larger default text, rows, tiles, touch targets and player icons; all sizes
  now live in res/values/dimens.xml
- Seek bar knob drawn in code, since Android 2.x caches XML shapes at the
  size they were first loaded
- Full-width buttons wrap to two lines instead of cutting words off
- Shorter labels so they fit 240x320 screens in both languages
- tools/check_fit.py checks that UI texts fit their slots at every size and
  language using Droid Sans metrics; build.sh runs it and setup_toolchain.sh
  fetches the font

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

res/layout/view_status.xml

@@ -12,7 +12,7 @@
         android:layout_width="wrap_content" android:layout_height="wrap_content" />
     <TextView android:id="@+id/status_text"
         android:layout_width="wrap_content" android:layout_height="wrap_content"
-        android:gravity="center" android:textColor="@color/text2" android:textSize="13sp"
+        android:gravity="center" android:textColor="@color/text2" android:textSize="@dimen/text_status"
         android:paddingTop="8dp" />
     <Button android:id="@+id/status_retry" style="@style/ButtonOutline"
         android:layout_width="wrap_content" android:layout_marginTop="12dp"