Update CarWatchdogDaemonTest text dump parsing logic to ignore case.

Update text dump parsing logic to ignore case while matching section
header.

Test: atest android.car.cts.CarWatchdogDaemonTest#testRecordsIoPerformanceData
Bug: 335514378
Change-Id: Id01ccf5137712ea4b98a2adab55dc5587e04800e