Avoid reusing the same battery view model instance in Kosmos

This change ensures a new model instance is always created via
factory.create() instead of reusing an existing one. Reusing the
same instance caused an error when attempting to activate an
already-activated model, which was discovered in the new test at
ag/35064871.

Bug:None
Flag:TEST_ONLY
Change-Id: Ib3f449796f04fc2d6b9daa04c5388ddc69c8276e