fix the issue slice cannot be triggered from uri

Bug: 122879432
Change-Id: Id36a45bbbdb858b5b8d9fd6f1b3f5f97eb84e9fd
Test:
1. install SliceViewer (https://github.com/android/user-interface-samples/releases)
2. adb shell am start -d "slice-https://sliceviewer.android.example.com/hello"
(cherry picked from commit 09b91e60)