audio_hal: Refine audio HAL dump API on Linux. [2/2]

PD#TV-26173

Problem:
Audio HAL device dump API is used on Android dumpsys
and on Linux it does not work.

Solution:
Adjust the output return as string in same way as
get_parameters so client side can get the dump info.

Verify:
U212 local build with new added hal_dump command.

Change-Id: Ie0365dbf07306e89fc3258c0f2c1fa0b33f648ca
6 files changed
tree: 53f6040a3b17cd0a94385de739b6b81c15cdd348
  1. include/
  2. src/
  3. Makefile