Fix incorrect boolean logic

Original code:
  isLittleEndian || isBigEndian && isLittleEndian != isBigEndian

By the default association rules, this is equivalent to:
  isLittleEndian || (isBigEndian && isLittleEndian != isBigEndian)

this apparently is not the intended logic. Fixed to
  (isLittleEndian || isBigEndian) && (isLittleEndian != isBigEndian)

Test: presubmit
Change-Id: I45a273bfbb7a8c492c1455020c23130d105cebdf