Refactor enterprise config

Change-Id: I7104250e80317fce6164385701a7caffbcd14813
eix enterprise config storage bugs

Reading empty and not updating was resulting in retaining old values
in a config. Also, fix matching phase2 entries.

Additionally, allow configuring subset of enterprise fields. Necessary
since password cannot be read back from supplicant.

Change-Id: I83a01690a0cf7cad1457a674f50f1e3a1a0441b5
Track keys per config and allow cert push from apps

Allow configuring keys for a configuration and update/delete
from wificonfigstore.

Change-Id: I79b43bf7ca58f7efc95f7dcc125fc84d7aa8c795
StreamingZipInflater: fix mmap'd end of read

When reaching the end of a mmap'd segment, it was erroneously trying to
read more data. This is because we were reading data one character at a
time, so we never reached the Z_STREAM_END result without going through
the loop once more.

Bug: https://code.google.com/p/android/issues/detail?id=39041
Change-Id: I6c53b8187384a42217c32112d6a0c2857f471109
Fixing missing internal link in document.

Change-Id: I80b8712815ac05acfa753cbb40875b869d2e942d