media.c2 aidl: add input surface for encoders

Bug: 315556623
Test: m
Change-Id: I9a7497f466e39b7fd223859cab49c26da359e401
diff --git a/media/c2/aidl/Android.bp b/media/c2/aidl/Android.bp
index 84cb382..b511e45 100644
--- a/media/c2/aidl/Android.bp
+++ b/media/c2/aidl/Android.bp
@@ -22,6 +22,9 @@
         "android.hardware.common-V2",
         "android.hardware.media.bufferpool2-V1",
     ],
+    include_dirs: [
+        "frameworks/native/aidl/gui",
+    ],
     stability: "vintf",
     backend: {
         cpp: {