Audio: Copy HAL V6 into V7

This is an automated copy performed using copyHAL.sh script.

Bug: 142480271
Test: m
Change-Id: Ifd91cc0bb59608cd92d1d8e4e76c3abea0a8da5e
diff --git a/audio/effect/7.0/xml/api/removed.txt b/audio/effect/7.0/xml/api/removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/audio/effect/7.0/xml/api/removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0