Revert "[Telephony mainline] Add SystemApi and NonNull annotation"

Revert "[Telephony Mainline] 1. Move the functionality about blo..."

Revert "[Telephony mainline] Move all METHOD_* constants from Sy..."

Revert "[Telephony mainline] Move the functionality into the cal..."

Revert submission 1175092-1575532679259-3b86bd03

Reason for revert: <Revisit and redesign in S>
Reverted Changes:
I5c4380f93:[Telephony mainline] Move all METHOD_* constants f...
I84bbfc13c:[Telephony mainline] Move METHOD_* constants from ...
I5a53cb416:[Telephony mainline] Move the functionality into t...
I69d1fd77c:[Telephony Mainline] 1. Move the functionality abo...
I619d6ba04:[Telephony mainline] Add SystemApi and NonNull ann...

Change-Id: I379281a1879dddcaae8862c9f970ef57892ecbea
Merged-In: I0749492a5648dfa2fb83271f349a8370972f7032