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>

tools/strings.py

@@ -256,6 +256,18 @@ S = {
     "set_delete_downloads": ("Delete all downloads (%1$s)", "Borrar todas as descargas (%1$s)"),
     "downloaded": ("Downloaded", "Descargada"),
     "quit_app": ("Close Plexamp Lite", "Pechar Plexamp Lite"),
+
+    # lyrics (as in the Mac app)
+    "lyrics": ("Lyrics", "Letra"),
+    "loading_lyrics": ("Loading lyrics…", "Cargando a letra…"),
+    "no_lyrics": ("No lyrics for this track", "Esta pista non ten letra"),
+    "lyrics_failed": ("Couldn't load the lyrics", "Non se puido cargar a letra"),
+
+    # home-screen widget, notification and lock-screen buttons
+    "widget_name": ("Plexamp Lite player", "Reprodutor de Plexamp Lite"),
+    "previous": ("Previous", "Anterior"),
+    "next": ("Next", "Seguinte"),
+    "play_pause": ("Play or pause", "Reproducir ou pausar"),
     "stalled": ("Playback got stuck: the network isn't keeping up.", "A reprodución quedou parada: a rede non dá abasto."),
     "quality_bt_title": ("Quality over Bluetooth", "Calidade por Bluetooth"),
     "set_quality_bt": ("Quality over Bluetooth: %1$s", "Calidade por Bluetooth: %1$s"),