优化

app/src/main/java/io/legado/app/constant/AppConst.kt

@@ -3,7 +3,7 @@ package io.legado.app.constant
 import android.annotation.SuppressLint
 import android.content.pm.PackageManager
 import android.provider.Settings
-import com.android.tools.r8.Keep
+import androidx.annotation.Keep
 import com.script.javascript.RhinoScriptEngine
 import io.legado.app.BuildConfig
 import splitties.init.appCtx

app/src/main/java/io/legado/app/model/BookCover.kt

@@ -4,7 +4,7 @@ import android.annotation.SuppressLint
 import android.content.Context
 import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
-import com.android.tools.r8.Keep
+import androidx.annotation.Keep
 import com.bumptech.glide.RequestBuilder
 import com.bumptech.glide.load.resource.bitmap.CenterCrop
 import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions