Remove plug/unplug condition for the incompatible charging state

Remove the plug/unplug condition checking for the incompatible charging
state, since system will send the intent again and clear the state
directly (https://b.corp.google.com/issues/276403405#comment3)

Bug: 276403405
Fix: 276403405
Test: atest KeyguardIndicationControllerTest KeyguardUpdateMonitorTest
Change-Id: Ibabbfd047d99bbb5a2e9d6553ea8a708ff797bd0