Minimize memory usage by reducing in-memory cover cache size (#2266)

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/App.kt

@@ -17,6 +17,7 @@ import androidx.lifecycle.ProcessLifecycleOwner
 import androidx.lifecycle.lifecycleScope
 import coil3.ImageLoader
 import coil3.SingletonImageLoader
+import coil3.memory.MemoryCache
 import coil3.network.okhttp.OkHttpNetworkFetcherFactory
 import coil3.request.allowRgb565
 import coil3.request.crossfade
@@ -196,6 +197,12 @@ class App : Application(), DefaultLifecycleObserver, SingletonImageLoader.Factor
                 add(MangaKeyer())
             }
 
+            memoryCache(
+                MemoryCache.Builder()
+                    .maxSizePercent(context)
+                    .build(),
+            )
+
             crossfade((300 * this@App.animatorDurationScale).toInt())
             allowRgb565(DeviceUtil.isLowRamDevice(this@App))
             if (networkPreferences.verboseLogging().get()) logger(DebugLogger())