android, desktop: local video encryption (#3678)

* android, desktop: local video encryption

* refactor

* different look of progress indicator

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

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

@@ -33,9 +33,9 @@ actual class VideoPlayer actual constructor(
   override val duration: MutableState<Long> = mutableStateOf(defaultDuration)
   override val preview: MutableState<ImageBitmap> = mutableStateOf(defaultPreview)
 
-  init {
-    setPreviewAndDuration()
-  }
+
+  // Currently unused because we use low-quality preview
+  // init { setPreviewAndDuration() }
 
   val player = ExoPlayer.Builder(androidAppContext,
     DefaultRenderersFactory(androidAppContext))
@@ -69,7 +69,7 @@ actual class VideoPlayer actual constructor(
   }
 
   private fun start(seek: Long? = null, onProgressUpdate: (position: Long?, state: TrackState) -> Unit): Boolean {
-    val filepath = getAppFilePath(uri)
+    val filepath = if (uri.scheme == "file") uri.toFile().absolutePath else getAppFilePath(uri)
     if (filepath == null || !File(filepath).exists()) {
       Log.e(TAG, "No such file: $filepath")
       brokenVideo.value = true