coil: gracefully handle file handling failures

Wrap the basic fetchArt call in a try statement to prevent exceptions
from being unable to open a file from propagating outwards. This allows
us to safely degrade when creating mosaics.

app/src/main/java/org/oxycblt/auxio/coil/AuxioFetcher.kt

@@ -50,11 +50,15 @@ abstract class AuxioFetcher : Fetcher {
             return null
         }
 
-        return if (settingsManager.useQualityCovers) {
+        return try {
+            if (settingsManager.useQualityCovers) {
                 fetchQualityCovers(context, album)
             } else {
                 fetchMediaStoreCovers(context, album)
             }
+        } catch (e: Exception) {
+            null
+        }
     }
 
     @Suppress("BlockingMethodInNonBlockingContext")
@@ -205,7 +209,7 @@ abstract class AuxioFetcher : Fetcher {
      */
     protected fun createMosaic(context: Context, streams: List<InputStream>, size: Size): FetchResult? {
         if (streams.size < 4) {
-            return streams.getOrNull(0)?.let { stream ->
+            return streams.firstOrNull()?.let { stream ->
                 return SourceResult(
                     source = ImageSource(stream.source().buffer(), context),
                     mimeType = null,

app/src/main/java/org/oxycblt/auxio/coil/Fetchers.kt

@@ -34,6 +34,7 @@ import org.oxycblt.auxio.music.Artist
 import org.oxycblt.auxio.music.Genre
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.ui.Sort
+import org.oxycblt.auxio.util.logD
 import kotlin.math.min
 
 /**
@@ -81,9 +82,12 @@ class ArtistImageFetcher private constructor(
             .sortAlbums(artist.albums)
 
         val results = albums.mapAtMost(4) { album ->
+            logD("${artist.name} ${album.name}")
             fetchArt(context, album)
         }
 
+        logD("OK: ${artist.name}")
+
         return createMosaic(context, results, size)
     }