camera: Update for enableZsl values in template

For apps targeting SDK versions O and newer, the value of enableZsl
may be true in still capture template. the value of enableZsl is
always false for other templates.

For apps targeting SDK versions older than O, the value of enableZsl
is always flase.

Test: make
Bug: 34983527
Change-Id: I23702ec49a460fc6877114384f85748c7c2ef6ba