uid_cputime: Check for the range while removing range of UIDs.

Checking if the uid_entry->uid matches the uid intended to be removed will
prevent deleting unwanted uid_entry.
Type cast the key for the hashtable to the same size, as when they were
inserted. This will make sure that we can find the uid_entry we want.

Bug: 25195548
Change-Id: Ib3c0be6d3994bd90bd3ab5b89a9e05afdc98f870
Signed-off: Ruchi kandoi <kandoiruchi@google.com>