Replace hard-coded errno values with OsConstants

Errno values have been hard-coded inside java code. On the native side
however, bionic's errno.h is used (through utils/Errors.h). Some of
the numbers are architecture dependent (EOPNOTSUPP, ETIMEDOUT...).

This causes Camera app to crash on MIPS devices. There is a check for
expected errors, in CameraBinderDecorator.throwOnError, but the error
(EOPNOTSUPP) is not recognized and an exception is thrown.

Change-Id: I8bcac8f1ced50c76614f566a6e624967a18a25e1