Coil 2.x upgrade (#6725)

* Migrate to Coil 2

* Adapt to use coil disk cache

* Update to alpha 7

* Update to alpha 8

* Update to rc01

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/ReaderPageImageView.kt

@@ -17,7 +17,7 @@ import androidx.annotation.CallSuper
 import androidx.annotation.StyleRes
 import androidx.appcompat.widget.AppCompatImageView
 import androidx.core.view.isVisible
-import coil.clear
+import coil.dispose
 import coil.imageLoader
 import coil.request.CachePolicy
 import coil.request.ImageRequest
@@ -152,7 +152,7 @@ open class ReaderPageImageView @JvmOverloads constructor(
     fun recycle() = pageView?.let {
         when (it) {
             is SubsamplingScaleImageView -> it.recycle()
-            is AppCompatImageView -> it.clear()
+            is AppCompatImageView -> it.dispose()
         }
         it.isVisible = false
     }