Revert "temporary build changes: permissive, no Philz"

This reverts commit 7eb97b222955cc00272d98dedd494daff22ed80b.
Revert "build libbt-vendor from source"

This reverts commit 0fefb2bab1189a31b30e87ba53ae2a5e3ee77360.
Restore use of legacy libbt-vendor (requires additional patches).
don't build 'PhilZ Recovery' from lollipop sources
lollipop: misc changes to support use of legacy libbt-vendor.so

this also requires a patch to external/bluetooth/bluedroid
SEPolicy: assign exFAT the same generic fs context as vfat

without a context, exFAT volumes can't be mounted
SEPolicy: allow sdcard daemon to examine unlabeled files & dirs