Fix Parcel.writeFixedArray javadoc

Reference to createFixedArray shoudl be escaped. Otherwise resulting
html renders as <s>(strikethrough) tag.

Bug: 227007069
Test: m online-sdk-docs
  and see if ./reference/android/os/Parcel.html works ok
Change-Id: I7a3b447cbeddd8d66ca1733dc8d115c61ece2509