Ensure the generation is not changed before put value to cache

It may get old value from mValues, so check the generation
is not changed before update cache

Bug: https://issuetracker.google.com/issues/64995655
Test: Build
Change-Id: Ia7ae18baa269d0590e36f186e2f14b0bfbab3504
Signed-off-by: xulicheng <xulicheng@xiaomi.com>
1 file changed