Correct test logic in isWakeupConsideredUnlockIntent_singleValue.

This changelist updates ActiveUnlockConfigTest's
isWakeupConsideredUnlockIntent_singleValue test to put the value of
ACTIVE_UNLOCK_WAKEUPS_CONSIDERED_UNLOCK_INTENTS as a String rather than
an int. This is consistent with the production usage of this value and
other tests such as isWakeupConsideredUnlockIntent_multiValue.

Test: atest ActiveUnlockConfigTest#isWakeupConsideredUnlockIntent_singleValue
Flag: EXEMPT bugfix
Fixes: 402551650
Change-Id: Ieead6dc28cef695318c90767d382752b7d43f927