Use a 64-bit instance of 0x1 when creating

the event bitmask.

Comments on ag/24025770 suggest that the bit
shift will lead to undefined behavior for
event codes greater than 31.

Bug: 290318208
Test: atest VtsHalWifiNanIfaceTargetTest
       # manually set some of the expected
       # events codes to > 31 to verify that
       # the bit shift works as expected
Change-Id: I09e11dac8acf90baf047e24cebe1d01970b1dc8a