Revert "Making software km implementation both backup and default"

This reverts commit cfc8b73b67b365c3c02b0d8a4ed1c0e7d031d4a9.

Reason for revert: Causing pre-submit failure with window manager
Bug: 148773266
Bug: 149892576

Change-Id: I1acd288aa1a1cb004d1118b7db775511a2cda344
1 file changed