AudioFlinger: Fix memory allocation for client-less tracks am: 1159ffd5e3 am: f242b890c4 am: 24ef54ecb8 am: a35816475b am: 1ce123cf91 am: d06e47540d am: 103b751e55 am: 0851e2f4c6 am: aff0808bcf am: 109247df7a
am: a92d05fc1e

Change-Id: I73340a812c24ea421d68fa88f6b18cfa4867a0a5