desktop: sending and receiving files via connected mobile (#3365)

* desktop: support remote files (WIP)

* working with remote files locally

* better

* working with remote file downloads

* sending files

* fixes of loading files in some situations

* image compression

* constant for remote hosts

* refactor

---------

Co-authored-by: Avently <7953703+avently@users.noreply.github.com>

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/Files.android.kt

@@ -23,6 +23,8 @@ actual val agentDatabaseFileName: String = "files_agent.db"
 
 actual val databaseExportDir: File = androidAppContext.cacheDir
 
+actual val remoteHostsDir: File = File(tmpDir.absolutePath + File.separator + "remote_hosts")
+
 actual fun desktopOpenDatabaseDir() {}
 
 @Composable

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/helpers/Utils.android.kt

@@ -167,7 +167,7 @@ actual fun getAppFileUri(fileName: String): URI =
   FileProvider.getUriForFile(androidAppContext, "$APPLICATION_ID.provider", if (File(fileName).isAbsolute) File(fileName) else File(getAppFilePath(fileName))).toURI()
 
 // https://developer.android.com/training/data-storage/shared/documents-files#bitmap
-actual fun getLoadedImage(file: CIFile?): Pair<ImageBitmap, ByteArray>? {
+actual suspend fun getLoadedImage(file: CIFile?): Pair<ImageBitmap, ByteArray>? {
   val filePath = getLoadedFilePath(file)
   return if (filePath != null && file != null) {
     try {