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 am: 85c8828a32 am: 2eed9fd5a0
am: 59e144ffff

Change-Id: If062d74a0217798101a767536dada4d853238f08