android: Fix crash on multiple selection of images

apps/android/app/src/main/java/chat/simplex/app/views/helpers/Enums.kt

@@ -1,7 +1,8 @@
 package chat.simplex.app.views.helpers
 
-import android.graphics.Bitmap
 import android.net.Uri
+import android.os.Parcel
+import android.os.Parcelable
 import androidx.compose.runtime.saveable.Saver
 import kotlinx.coroutines.flow.MutableStateFlow
 
@@ -32,7 +33,40 @@ enum class NewChatSheetState {
   }
 }
 
-sealed class UploadContent {
-  data class SimpleImage(val uri: Uri): UploadContent()
-  data class AnimatedImage(val uri: Uri): UploadContent()
+/**
+ * [Parcelable] implementation is needed to prevent a crash. Without it this situation produce a crash:
+ * - select images in SendMsgView
+ * - do this again without sending or dismissing previous selection
+ * */
+sealed class UploadContent: Parcelable {
+  data class SimpleImage(val uri: Uri): UploadContent(), Parcelable {
+    constructor(parcel: Parcel): this(parcel.readParcelable<Uri>(Uri::class.java.classLoader) as Uri)
+    override fun describeContents(): Int = 0
+    override fun writeToParcel(dest: Parcel?, flags: Int) {
+      dest?.writeParcelable(uri, 0)
+    }
+    companion object CREATOR: Parcelable.Creator<SimpleImage> {
+      override fun createFromParcel(parcel: Parcel): SimpleImage {
+        return SimpleImage(parcel)
+      }
+      override fun newArray(size: Int): Array<SimpleImage?> {
+        return arrayOfNulls(size)
+      }
+    }
+  }
+  data class AnimatedImage(val uri: Uri): UploadContent(), Parcelable {
+    constructor(parcel: Parcel): this(parcel.readParcelable<Uri>(Uri::class.java.classLoader) as Uri)
+    override fun describeContents(): Int = 0
+    override fun writeToParcel(dest: Parcel?, flags: Int) {
+      dest?.writeParcelable(uri, 0)
+    }
+    companion object CREATOR: Parcelable.Creator<AnimatedImage> {
+      override fun createFromParcel(parcel: Parcel): AnimatedImage {
+        return AnimatedImage(parcel)
+      }
+      override fun newArray(size: Int): Array<AnimatedImage?> {
+        return arrayOfNulls(size)
+      }
+    }
+  }
 }