audiohal: Fix handling of invalid arguments in 'debugDump' methods

Add checks for validity of the passed in native handle.

Bug: 37590777
Change-Id: If906f0086c3442819e1844cc521215d5b74af015
Test: VTS
(cherry picked from commit 7bae6a0b635b142cfba9d4c4612e1e114f85b842)
5 files changed