AccountMediaFragment improvements (#2684)

* initial setup

* add spacing between images

* use blurhash

* handle hidden state and show video indicator

* handle item clicks

* small cleanup

* move SquareImageView into account.media package

* fix build

* improve AccountMediaGridAdapter

* handle loadstate, errors and refreshing

* remove commented out code

* log error

* show audio attachments with icon

* fix glitchy transition animation

* set image Description on imageview

* show toast with media description on long press

app/src/main/java/com/keylesspalace/tusky/util/AttachmentHelper.kt

@@ -0,0 +1,26 @@
+@file:JvmName("AttachmentHelper")
+package com.keylesspalace.tusky.util
+
+import android.content.Context
+import com.keylesspalace.tusky.R
+import com.keylesspalace.tusky.entity.Attachment
+import kotlin.math.roundToInt
+
+fun Attachment.getFormattedDescription(context: Context): CharSequence {
+    var duration = ""
+    if (meta?.duration != null && meta.duration > 0) {
+        duration = formatDuration(meta.duration.toDouble()) + " "
+    }
+    return if (description.isNullOrEmpty()) {
+        duration + context.getString(R.string.description_post_media_no_description_placeholder)
+    } else {
+        duration + description
+    }
+}
+
+private fun formatDuration(durationInSeconds: Double): String {
+    val seconds = durationInSeconds.roundToInt() % 60
+    val minutes = durationInSeconds.toInt() % 3600 / 60
+    val hours = durationInSeconds.toInt() / 3600
+    return "%d:%02d:%02d".format(hours, minutes, seconds)
+}