Update XML schemas.

- Add <transport> to manifest hal
- Fix compatibility matrix <kernel><config> schema; it contains an
  attribute type and text content.
- Remove <regex-instance> from manifest hal
- Add minOccurs=0 for optional tags
- Add <kernel> to manifest

Test: xmllint verified_assembled_* in PRODUCT_OUT
Change-Id: I4548a2269abf3f7c6f1f16fda6715453e3cd3b15
4 files changed