Upgrade the audio effect version

The Cuttlefish manifest requires audio effect 7.0, so we need to upgrade the version in our mk file too.

Bug: 199331175

Test: build, flash, boot and play sounds
Change-Id: Ic707d257b7f8fac6c8920151ad46b84b7e812849
diff --git a/aosp_trout_common.mk b/aosp_trout_common.mk
index 959624c..014afc2 100644
--- a/aosp_trout_common.mk
+++ b/aosp_trout_common.mk
@@ -28,7 +28,7 @@
     audio.primary.caremu \
     audio.r_submix.default \
     android.hardware.audio@6.0-impl:32 \
-    android.hardware.audio.effect@6.0-impl:32 \
+    android.hardware.audio.effect@7.0-impl:32 \
     android.hardware.audio.service \
     android.hardware.soundtrigger@2.3-impl