Plexamp Lite 1.14: Android 4.1 build with ExoPlayer, lyrics, home-screen widget

- One build per Android level, as in Tenda: build/PlexampLite.apk (Android 2.2+, versionCode 1508) and
  build/PlexampLite-api16.apk (Android 4.1+, 1516), from shared src/ plus platform/api8 or platform/api16.
- Android 4.1 build: ExoPlayer 2.18.7 behind a small Engine interface (gapless hand-over to read-ahead and
  downloaded files, a longer buffer, MediaPlayer fallback for tracks it can't decode), a notification and
  lock screen with art and buttons, a resizable widget, Holo, a menu button without a Menu key, metered networks.
  R8 shrinks ExoPlayer and Guava (tools/fetch_exoplayer.sh, tools/r8-rules.pro).
- Both builds: lyrics in Now Playing as in the Mac app (timed lyrics follow and seek), a home-screen widget,
  media play/pause keys, the moon icon drawn without clipPath.
- PlexampLite-noreport on the SD card stops play reports, for tests against a real server.

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

res/values/dimens.xml

@@ -19,6 +19,8 @@
     <dimen name="text_mini_sub">13sp</dimen>
     <dimen name="text_card_title">13sp</dimen>
     <dimen name="text_log">11sp</dimen>
+    <dimen name="text_lyrics">19sp</dimen>        <!-- timed lyrics in Now Playing -->
+    <dimen name="text_lyrics_plain">16sp</dimen>  <!-- plain-text lyrics -->
 
     <!-- touch targets and bars -->
     <dimen name="touch">48dp</dimen>