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>

tools/setup_toolchain.sh

@@ -54,6 +54,14 @@ PY
   python3 "$PROJ/tools/patch_bc_dalvik.py" bcsrc
 fi
 
+echo "== Droid Sans (Android 2.x's font), for tools/check_fit.py"
+if [ ! -f fonts/droidsans-regular.ttf ]; then
+  mkdir -p fonts dl/fonts
+  curl -sSL -o dl/droid.tgz "$(curl -sS https://registry.npmjs.org/connect-fonts-droidsans/latest | python3 -c 'import json,sys;print(json.load(sys.stdin)["dist"]["tarball"])')"
+  tar xzf dl/droid.tgz -C dl/fonts
+  cp dl/fonts/package/fonts/latin/droidsans-regular.ttf dl/fonts/package/fonts/latin/droidsans-bold.ttf fonts/
+fi
+
 echo "== signing key"
 if [ ! -f minamp.keystore ]; then
   if [ -f "$PROJ/signing/minamp.keystore" ]; then cp "$PROJ/signing/minamp.keystore" .; else