Add audit watch rule support and bugfixes

Add libaudit support for adding directory watch rules.
Add rule parsing support to auditd.
Rule format matches auditctl. Currently only supports -w and -e.
Fields supported are uid, euid, suid, fsuid, loginuid, gid, egid, sgid, fsgid and success.
Fields allow further limiting of matches, for example:
 -w /system -pwa -F uid!=system -F success=1
will match a write on /system that was successful and done by a uid other than system

Retry on EAGAIN from recvfrom on the audit netlink socket.
Always enable audit syscall functionality on start of auditd.

Signed-off-by: Joshua Brindle <brindle@quarksecurity.com>

Change-Id: I74a94dbffde835a27539559427f22b73a4c7ea24

Conflicts:
	auditd/README

Conflicts:
	auditd/README
Add sample audit.rules file.

To use:
adb push audit.rules /data/misc/audit
adb reboot
init: Make restorecon_recursive work for /data/

In the following commit:

    commit f2b7ee765516c84a9995e3acdc8fbcd7dc1b33cc
    Author: Stephen Smalley <sds@tycho.nsa.gov>
    Date:   Thu Feb 6 13:52:52 2014 -0500

    Apply restorecon_recursive to all of /data.

they removed all the adhoc restorecon_recursive of subdirectories
of /data/ and replaced it with:

    # Set SELinux security contexts on upgrade or policy update.
    restorecon_recursive /data

Unfortunately, that is a no-op because restorecon doesn't recurse
through /data/ unless you add a FORCE flag.

Since the expectation seems to be that the recursive restorecon
in init will actually work, update the built-in to add the force
flag and a flag to allow /data/data to also be recursed through.

[RC: Removed the DATADATA flag. It throws a ton of errors, and it's
supposed to be handled by seapp_contexts, not file_contexts. The actual
root paths, however, now get their individual restorecon calls so that
installd can deal with them]

Change-Id: I435c505188e924b27ef2e6a2e0ee0a6951e43f0e
system: Support for offloading Java audio tracks

Offload Java audio tracks if the property is set.
This is used to avoid mixing in audioflinger and
to apply effects in DSP. Also update function to
calculate bytes per sample for offload format.

Change-Id: I0705e70a806a335e372e844de8a1210fbfe58cd7
logd: throttle SELinux denials to 20/sec

Impose a limit of 20 selinux denials per second. Denials beyond
that point don't add any value, and have the potential to cause
crashes or denial of service attacks.

Do some other misc cleanup while I'm here.

Bug: 18341932
Change-Id: I6125d629ae4d6ae131d2e53bfa41e1f50277d402
healthd: Reinitialize mChargerNames for every battery update

Booting up the device without the usb sets the usb power supply
type as UNKNOWN. Due to this mChargerNames gets incorrectly
initialized at bootup. The value of usb power supply type changes
at run-time. So it makes sense to update mChargerNames everytime
we have a battery related update.

Change-Id: I2ec9f9a420ca61814d43c316b418ce94de3691bc
audio: Add 24-bit offload format to audio_bytes_per_sample

Change-Id: I238f302beadf8ba7705ffcb70639fb32be4ff2c4
Healthd: charger: allow override of LED/BACKLIGHT paths

Change-Id: Ib7372e441d554e16ffc20ce43993ee78cdc5b187
Merge branch 'lollipop' of github.com:AOSPA-legacy/android_system_core into l-experimental