Allow gsid to read from /storage/emulated/...

so that `gsi_tool install ... < /storage/emulated/...` can work.

Bug: 165471299
Test: adb push system.img /storage/emulated/0/Download &&
  adb root && adb shell 'gsi_tool install \
  --gsi-size $(du -b /storage/emulated/0/Download/system.img | cut -f1) \
  < /storage/emulated/0/Download/system.img'
Change-Id: I1dd435e32a4b5b5ebe2473cc703bfdd0d755a4e7
1 file changed