Specify include path for time_in_state.c

The include path system/bpf/progs/include is no more hardcoded in
bpf.go. Thus, we add it explicitly in Android.bp of time_in_state.c.

Bug: 202086915
Test: build and boot
Change-Id: Ifdc9531da217f3c772b8d39575255c19fa87e358
diff --git a/Android.bp b/Android.bp
index 477f649..bc363b1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -33,6 +33,9 @@
         "-Wall",
         "-Werror",
     ],
+    include_dirs: [
+        "system/bpf/progs/include",
+    ],
 }
 
 cc_library {