AudioFlinger: Get shared heap size from property

For consecutive 24bit, 192kHz, 7.1 content 4MB heap is not enough.
So exposing a propery ro.af.client_heap_size_kbyte to set platform
specific shared client heap size.

Change-Id: I2fb257c5fecc0245aa3a07998c2bfd6864a7d64f
1 file changed