axolotl: aaudio: try mmap path and fall back to legacy if needed

Test: CTS-V, Audio Loopback
Change-Id: Ibe60906717648de3f3859fc72001864032984039
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/product.prop b/product.prop
index 3c93b74..c7e582e 100644
--- a/product.prop
+++ b/product.prop
@@ -2,6 +2,11 @@
 # product.prop for axolotl
 #
 
+# AAudio - MMAP
+aaudio.mmap_policy=2
+aaudio.mmap_exclusive_policy=2
+aaudio.hw_burst_min_usec=2000
+
 # Dex2oat
 dalvik.vm.dex2oat64.enabled=true