feat: scan media store for pairing

app/src/main/java/at/lockstep/player/util/SafInitialUris.kt

@@ -1,15 +1,41 @@
 package at.lockstep.player.util
 
+import android.content.Context
 import android.net.Uri
+import android.os.Build
+import android.os.storage.StorageManager
 import android.provider.DocumentsContract
 
 object SafInitialUris {
     private const val EXTERNAL_STORAGE_AUTHORITY = "com.android.externalstorage.documents"
+    private const val INITIAL_URI_EXTRA = "android.provider.extra.INITIAL_URI"
 
-    /** Internal-storage Documents — avoids the blocked volume root shown on Pixel devices. */
-    fun internalDocuments(): Uri =
-        DocumentsContract.buildDocumentUri(
+    /**
+     * Internal-storage Documents. Uses [StorageManager] on Android 10+ so the system picker
+     * lands in a choosable folder instead of the blocked volume root on Pixel devices.
+     */
+    fun internalDocuments(context: Context): Uri {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            val storageManager = context.getSystemService(StorageManager::class.java)
+            val intent = storageManager.primaryStorageVolume.createOpenDocumentTreeIntent()
+            val root =
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                    intent.getParcelableExtra(INITIAL_URI_EXTRA, Uri::class.java)
+                } else {
+                    @Suppress("DEPRECATION")
+                    intent.getParcelableExtra(INITIAL_URI_EXTRA)
+                }
+            if (root != null) {
+                val scheme =
+                    root
+                        .toString()
+                        .replace("/root/", "/document/") + "%3A" + "Documents"
+                return Uri.parse(scheme)
+            }
+        }
+        return DocumentsContract.buildDocumentUri(
             EXTERNAL_STORAGE_AUTHORITY,
             "primary:Documents",
         )
+    }
 }