keymint: Update version for strongbox feature flag

There's no version info in the default settings.
Add a version field to specify that.

Valid versions are:
-  40 for Keymaster 4.0,
-  41 for Keymaster 4.1, and
- 100 for KeyMint 1.

Bug: 186481293
Bug: 188716468
Bug: 192634248
Change-Id: I59f65b6c185a5da863ca2070cd6d7cb05d5d2164