AudioFlinger: Fix memory allocation for client-less tracks am: 1159ffd5 am:...

AudioFlinger: Fix memory allocation for client-less tracks am: 1159ffd5 am: f242b890 am: 24ef54ec am: a3581647 am: 1ce123cf am: d06e4754 am: 103b751e am: 0851e2f4 am: aff0808b am: 109247df am: a92d05fc am: 85c8828a am: 2eed9fd5 am: 59e144ff am: ab73156c am: 064e8f2e am: b0399f39
am: f376b98e

Change-Id: Ie00977f42c39bc54ff169d85fa4a38c441a6ef5b