HDMI: Disable CEC on standby when Low Power Standby is enabled

Add the option for OEMs to set a custom property
(`persist.sys.hdmi.property_disable_cec_on_standby_in_low_energy_mode`) to allow CEC to be disabled when TV is in turned off when low energy mode is used.

Test: atest com.android.server.hdmi
Bug: 371617005
Flag: EXEMPT urgent feature
Change-Id: I65bb94bc2ddedd0863d6e5cc868a60f6ae0634fb