HDMI: Fix BCD handling error

isValidHour/isValidMinute accept a parameter as BCD encoded value, but they check it without translating to raw value, so valid hour/minute may be detected as an error;
e.g.
18:00 is within 23:00 but 0x18(24) is over 23
* 0x18 should be decoded  (0x10 >> 4) x 10 + 0x08 = 18

Fix to translate the parameter before checking by isWithinRange.

Bug: 357733495
Change-Id: Id0cfb1211048b1f2eaebf3db5814e3da0f34e5b9