Revert sensors multihal 2.0 changes temporarily.

Revert the changes that added multihal support to sensors HAL 2.0 while
waiting for merge from the same changes added to AOSP.

07b442e9 (refs/published/mh2_2) MH2 | Write processedEvents instead of
original events.
b38f2e25 Merge "MH2 | Check that subhal index is in range"
d38f9947 Merge "MH2 | Implement debug method of HalProxy"
bf46132f (refs/published/mh2_4, mh2_4) MH2 | Implement debug method of
HalProxy
1de5bb33 MH2 | Fix wakelock name
e0721534 (refs/published/mh2_3, mh2_3) MH2 | Check that subhal index is
in range
336c1c71 MH2 | Add restart logic in HalProxy::initialize method.
731d7125 MH2 | Change rc file to more appropriate settings
f09465d1 MH2 | Add makeFMQ helpers to HalProxy_test
75cc7bf2 MH2 | Implement wakelock processing thread
e93fdf9a MH2 | Implement dynamic sensors callbacks on HalProxy
82b84148 Remove libhwbinder/libhidltransport deps
d45e49b4 Merge "MH2 | Implement pending writes thread"
59714269 MH2 | Implement pending writes thread
db23aa82 MH2 | Implement direct channel and direct report methods
83e4370a MH2 | Implement injectSensorData method of HalProxy
d0cd57d4 MH2 | Implement ScopeWakelock ctor and dtor
537c0274 MH2 | Add rough proxy callback postEvents method
f97a3f35 Multihal 2.0 - Small tweaks to sensorHandle handling
7a723546 MultiHal 2.0 - setOperationMode and init direct channel flags
dc7a8e78 MultiHal 2.0 - Get sensors list from subhals
4b4c7b74 MultiHal 2.0 - activate, batch, flush methods of HalProxy
1638531d MultiHal 2.0 - proxying api calls helper methods
aacbf948 Set up shell to use for unit tests
2879067d Multihal 2.0 - Implement SubHal discovery
c34e6683 Add a sub-HAL implementation for testing multi-HAL
a689f8a6 Add skeleton for multihal 2.0

Bug: 136511617
Test: N/A
Change-Id: Ic3588f42cf60aee6ca915be19b834462aeb7a95c