clear the build warnings and fail on new ones

A clean build now emits no warnings of its own, and Kotlin
`allWarningsAsErrors` plus lint `warningsAsErrors` stop new ones from
sneaking back in.

- Kotlin: give SearchFilter's @StringRes parameter an explicit @param:
  target; use safe calls for File.parentFile in StringResourcesTest.
- Packaging: keep debug symbols for the prebuilt .so files that have no
  symbol table, which is what the "unable to strip" warning was about.
- Lint: move `modifier` to the first optional parameter across the Compose
  screens, use mutableIntStateOf for int state, read Resources via
  LocalResources, use the KTX Bitmap.get/String.toUri, drop the unused
  ic_action_name and ic_stat_name bitmaps and the dead -v24 qualifier on
  the notification vector, fix the pt-BR "album" accents and the unused
  Vietnamese/Thai plural quantities, and suppress the intentional
  cleartext/user-certificate, backup, exported-service and
  plural-candidate findings. Disable the version-update nags, which the
  dependency-update process owns.

The AboutLibraries plugin still resolves the variant classpaths during
configuration, so AGP keeps warning about that one; upstream in
mikepenz/AboutLibraries#1369.

app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />
@@ -18,7 +19,8 @@
         android:networkSecurityConfig="@xml/network_security_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
-        android:theme="@style/Theme.Subtracks">
+        android:theme="@style/Theme.Subtracks"
+        tools:ignore="DataExtractionRules,UnusedAttribute">
 
         <activity
             android:name=".MainActivity"
@@ -35,7 +37,8 @@
         <service
             android:name=".playback.PlaybackService"
             android:exported="true"
-            android:foregroundServiceType="mediaPlayback">
+            android:foregroundServiceType="mediaPlayback"
+            tools:ignore="ExportedService">
             <intent-filter>
                 <action android:name="androidx.media3.session.MediaSessionService" />
             </intent-filter>