audio: Update Audio HIDL to 7.1

Bug: 205235270
Test: build pass
Signed-off-by: Carter Hsu <carterhsu@google.com>
Change-Id: Ic2f5708f10dfeac7df75d7279bddb001f4fdcbe6

manifest.xml

@@ -2,7 +2,7 @@
    <hal format="hidl">
         <name>android.hardware.audio</name>
         <transport>hwbinder</transport>
-        <version>7.0</version>
+        <version>7.1</version>
         <interface>
             <name>IDevicesFactory</name>
             <instance>default</instance>