Revert "Add Activity non-config instance map-like API"

Revert "Tests for non-config instance map"

Revert submission 11077952-non-config-map

Reason for revert: API council would like to go straight to Jetpack
Reverted Changes:
Ib2484d433:Add Activity non-config instance map-like API
Ibc3daf82f:Tests for non-config instance map

Bug: 155401916
Change-Id: I9dd8226375e86d66b8cef3731642c0cf9f74434c