Revert of 🎣 Make Android .build_configs aware of prebuilts and java sources

build/android/gyp/javac.py

Index: build/android/gyp/javac.py
diff --git a/build/android/gyp/javac.py b/build/android/gyp/javac.py
index 7b5264d3794f56996b7f478144c67a7a52fb0810..6c91424710039d58c70f0f821670b0c9e01cfcfc 100755
--- a/build/android/gyp/javac.py
+++ b/build/android/gyp/javac.py
@@ -324,17 +324,7 @@
   options.javac_includes = build_utils.ParseGypList(options.javac_includes)
   options.jar_excluded_classes = (
       build_utils.ParseGypList(options.jar_excluded_classes))
-
-  java_files = []
-  for arg in args:
-    # Interpret a path prefixed with @ as a file containing a list of sources.
-    if arg.startswith('@'):
-      with open(arg[1:]) as f:
-        java_files.extend(l.strip() for l in f)
-    else:
-      java_files.append(arg)
-
-  return options, java_files
+  return options, args
 
 
 def main(argv):