This switches Wi-Fi HAL policy to the design which enables us to
conditionally remove unnecessary rules from domains which are clients
of Wi-Fi HAL.

Domains which are clients of Wi-Fi HAL, such as system_server domain,
are granted rules targeting hal_wifi only when the Wi-Fi HAL runs in
passthrough mode (i.e., inside the client's process). When the HAL
runs in binderized mode (i.e., in another process/domain, with clients
talking to the HAL over HwBinder IPC), rules targeting hal_wifi are
not granted to client domains.

Domains which offer a binderized implementation of Wi-Fi HAL, such as
hal_wifi_default domain, are always granted rules targeting hal_wifi.

Test: Setup Wizard (incl. adding a Google Account) completes fine with
      Wi-Fi connectivity only
Test: Toggle Wi-Fi off, on, off, on
Test: Use System UI to see list of WLANs and connect to one which does
      not require a password, and to one which requries a PSK
Test: ip6.me loads fine in Chrome over Wi-Fi
Bug: 34170079

Change-Id: I7a216a06727c88b7f2c23d529f67307e83bed17f

All hals need to use hwbinder.

Test: no additional denials
Bug: 34180936
Change-Id: Ie92cdbd79fc75062c4afa4cda53cb57ccde7e370

Bug: 32123421
Bug: 32905206

Test: compiles, nfc works
Change-Id: Ibf72ef70255573e4df0863ea640354b3c37eb47d

Need write permissions on the specified sysfs path for reloading
firmware.

Denials:
01-21 23:39:01.650  4669  4669 W android.hardwar: type=1400
audit(0.0:103): avc: denied { write } for name="fwpath" dev="sysfs"
ino=6847 scontext=u:r:hal_wifi:s0
tcontext=u:object_r:sysfs_wlan_fwpath:s0 tclass=file permissive=0
01-21 23:39:01.653  4669  4669 E android.hardware.wifi@1.0-service:
Failed to open wlan fw path param: Permission denied

Bug: 32018162
Test: Denials no longer present in the logs.
Change-Id: I1a468e7c2a2a4360a2b61f04f1940471d52d0dd6

We're going to be using Android framework directly to invoke Wifi HIDL
calls. So, change permissions appropriately.

Bug: 33398154
Test: Verfied that framework is able to make HIDL calls using
go/aog/310610.

Change-Id: I4d0d88961753ad73f3876aec58b26b89486cc02a

Renaming the wifi HIDL implementation to 'hal_wifi' from 'wifi_hal_legacy'
to conform with HIDL style guide.

Denials:
01-01 21:55:23.896  2865  2865 I android.hardware.wifi@1.0-service:
wifi_hal_legacy is starting up...
01-01 21:55:23.898  2865  2865 W android.hardware.wifi@1.0-service:
/odm/lib64/hw/ does not exit.
01-01 21:55:23.899  2865  2865 F android.hardware.wifi@1.0-service:
service.cpp:59] Check failed: service->registerAsService("wifi") ==
android::NO_ERROR (service->registerAsService("wifi")=-2147483646,
android::NO_ERROR=0) Failed to register wifi HAL
01-01 21:55:23.899  2865  2865 F libc    : Fatal signal 6 (SIGABRT),
code -6 in tid 2865 (android.hardwar)
01-01 21:55:23.901   377   377 W         : debuggerd: handling request:
pid=2865 uid=2000 gid=2000 tid=2865
01-01 21:55:23.907  2867  2867 E         : debuggerd: Unable to connect
to activity manager (connect failed: Connection refused)
01-01 21:55:23.908  2867  2867 F DEBUG   : *** *** *** *** *** *** ***
*** *** *** *** *** *** *** *** ***
01-01 21:55:23.908  2867  2867 F DEBUG   : Build fingerprint:
'Android/aosp_angler/angler:7.0/NYC/rpius10031052:userdebug/test-keys'
01-01 21:55:23.908  2867  2867 F DEBUG   : Revision: '0'
01-01 21:55:23.908  2867  2867 F DEBUG   : ABI: 'arm64'
01-01 21:55:23.908  2867  2867 F DEBUG   : pid: 2865, tid: 2865, name:
android.hardwar  >>> /system/bin/hw/android.hardware.wifi@1.0-service
<<<
01-01 21:55:23.909  2867  2867 F DEBUG   : signal 6 (SIGABRT), code -6
(SI_TKILL), fault addr --------
01-01 21:55:23.910  2867  2867 F DEBUG   : Abort message:
'service.cpp:59] Check failed: service->registerAsService("wifi") ==
android::NO_ERROR (service->registerAsService("wifi")=-2147483646,
android::NO_ERROR=0) Failed to register wifi HAL'

Bug: 31821133
Test: Compiled and ensured that the selinux denials are no longer
present in logs.
Change-Id: I5bbbcad307e9bb9e59fff87e2926751b3aecc813