Detached permission request from DiskUtil (#10051)

Being an extension on the DiskUtil couples to a class at a different abstraction
 layer without really needing to. Created PermissionRequestHelper as a place to
 put similar requests if needed in the future.

app/src/main/java/eu/kanade/presentation/permissions/PermissionRequestHelper.kt

@@ -0,0 +1,20 @@
+package eu.kanade.presentation.permissions
+
+import android.Manifest
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import com.google.accompanist.permissions.rememberPermissionState
+
+/**
+ * Launches request for [Manifest.permission.WRITE_EXTERNAL_STORAGE] permission
+ */
+object PermissionRequestHelper {
+
+    @Composable
+    fun requestStoragePermission() {
+        val permissionState = rememberPermissionState(permission = Manifest.permission.WRITE_EXTERNAL_STORAGE)
+        LaunchedEffect(Unit) {
+            permissionState.launchPermissionRequest()
+        }
+    }
+}