Add default mutator/random generator for TYPE_HIDL_MEMORY.

The default behavior is effectively generating nullptr for
TYPE_HIDL_MEMORY variables. Without this change the fuzzer simply aborts
when it sees TYPE_HIDL_MEMORY.

Test: SANITIZE_TARGET="address coverage" make vts -j64 && vts-tradefed
run commandAndExit vts --skip-all-system-status-check --primary-abi-only
--skip-preconditions -l VERBOSE --module
VtsHalAudioEffectV2_0IfaceFuzzer

Merged-In: If6f6bf40dc02a836b7c6cd76b6e0b241e0e955d8
Change-Id: If6f6bf40dc02a836b7c6cd76b6e0b241e0e955d8
(cherry picked from commit 80d2a36a20ede34b30771ecb1144b44f1adf82db)
1 file changed