Revert "add: HALO batch envelope HDPI and MDPI icon for non-numbered items"

This reverts commit 2e08a92061cc60b5fe473426d719eabc5419cff8.
HALO: batch message icon for hdpi and mdpi

It's hard to keep up with Paul hehe
Merge branch 'jb2' of github.com:CarbonDev/android_frameworks_base into jb2