Move class loader context definitions to a separate file.

Test: lunch aosp_cf_x86_phone-userdebug && m
Bug: 132357300
Change-Id: I1e7e9db1654d0b835276be1cfa6a8eeffc5e96ee
diff --git a/dexpreopt/Android.bp b/dexpreopt/Android.bp
index b8f7ea6..94c0361 100644
--- a/dexpreopt/Android.bp
+++ b/dexpreopt/Android.bp
@@ -2,6 +2,7 @@
     name: "soong-dexpreopt",
     pkgPath: "android/soong/dexpreopt",
     srcs: [
+        "class_loader_context.go",
         "config.go",
         "dexpreopt.go",
         "testing.go",