Revert "SystemServer: spawn hwbinder threads before BatteryService"

This reverts commit 889902c9.

Reason for revert: b41e87ae680beefd0d39a127d1ea0b2614caa5f9 fixes 
the root issue. Revert the workaround.

Change-Id: I2f5dfaee8bda17b1d6aeb8418b4a64084b6a6b56
Test: multiple boots
Bug: 68785531
Bug: 68765551