ANDROID: fips140: adjust some log messages

Downgrade some expected log messages from pr_warn() to pr_info().

Also remove "FIPS 140" from some log messages since the messages are
already prefixed with "fips140: " (the name of the module) which makes
it redundant.

Bug: 153614920
Bug: 188620248
Change-Id: I94055d7a5a86a770fcf38e958e7d7497b4bafdf0
Signed-off-by: Eric Biggers <ebiggers@google.com>