This patch fixes Gatekeeper HAL rules.

Bug: 34260418
Test: Device boots with gatekeeper_hal using hwbinder and
      gatekeeperd does not fall back to software.
Change-Id: I6aaacb08faaa7a90506ab569425dc525334c8171

This switches most remaining HALs to the _client/_server approach.
To unblock efforts blocked on majority of HALs having to use this
model, this change does not remove unnecessary rules from clients of
these HALs. That work will be performed in follow-up commits. This
commit only adds allow rules and thus does not break existing
functionality.

The HALs not yet on the _client/_server model after this commit are:
* Allocator HAL, because it's non-trivial to declare all apps except
  isolated apps as clients of this HAL, which they are.
* Boot HAL, because it's still on the non-attributized model and I'm
  waiting for update_engine folks to answer a couple of questions
  which will let me refactor the policy of this HAL.

Test: mmm system/sepolicy
Test: Device boots, no new denials
Test: Device boots in recovery mode, no new denials
Bug: 34170079
Change-Id: I03e6bcec2fa02f14bdf17d11f7367b62c68a14b9

All hals need to use hwbinder.

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

Change-Id: I79a305407c3a362d7be11f4c026f31f1e9666f1c
Signed-off-by: Alexey Polyudov <apolyudov@google.com>