Enable plugins only for required modules

These plugins were active/available globally but that doesn't need to be the case
considering only the :app module uses it now, so they have been disabled and enabled
within the said module.

This is how modern app works with plugins in the standard template.

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>
Change-Id: I3f859e642d67329038479a02cf89e9f5666fe6bb