feat: implement station navigation and update to SDK 37

- Implement `seekToNext` and `seekToPrevious` in `PlayerService` to allow switching between radio stations.
- Update `compileSdk` and `targetSdk` to 37 and bump version to 14.6.
- Modify `PlayerService` to remain active while paused to improve playback resumption.
- Modernize media resumption logic using Media3 `isRecent` check instead of legacy extras.
- Refactor `DefaultRenderersFactory` to use non-nullable `AudioSink` return types.
- General code cleanup using KTX extensions (e.g., `View.isEmpty()`) and Kotlin property access syntax.

app/build.gradle.kts

@@ -5,14 +5,14 @@ plugins {
 
 android {
     namespace = "com.michatec.radio"
-    compileSdk = 36
+    compileSdk = 37
 
     defaultConfig {
         applicationId = "com.michatec.radio"
         minSdk = 28
-        targetSdk = 36
-        versionCode = 145
-        versionName = "14.5"
+        targetSdk = 37
+        versionCode = 146
+        versionName = "14.6"
     }
 
     compileOptions {