media.c2 aidl: change minSdk to 30

Test: m
Bug:254050314
Change-Id: I62613e59146599b49ae69c84d033eca39fcfdb18
diff --git a/media/c2/aidl/Android.bp b/media/c2/aidl/Android.bp
index 3f2cadb..a153b72 100644
--- a/media/c2/aidl/Android.bp
+++ b/media/c2/aidl/Android.bp
@@ -11,7 +11,7 @@
 
 aidl_interface {
     name: "android.hardware.media.c2",
-    min_sdk_version: "31",
+    min_sdk_version: "30",
     vendor_available: true,
     double_loadable: true,
     srcs: ["android/hardware/media/c2/*.aidl"],