Build required modules from default

Some required modules from host tool (such as imgdiff) are bound to
required from releasetools_common, but unfortunately required modules
from python_library_host does not work (b/140144201). To make this work
we should mark dependency from each host tool.

Bug: 152258157
Test: Build succeeded without system image
Change-Id: Iedfda9b48d78687d8f622b818eeb93896d4f119d