media: Clean up MediaCodecBridge and remove subclasses

media/base/BUILD.gn

Index: media/base/BUILD.gn
diff --git a/media/base/BUILD.gn b/media/base/BUILD.gn
index 55f6987ced9f2ffe13ba2408d8aebe07dd98aa91..3d5b26c9db5610d89f34fe1dc559adaf9a376cc1 100644
--- a/media/base/BUILD.gn
+++ b/media/base/BUILD.gn
@@ -10,6 +10,10 @@ import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
+if (is_android) {
+  import("//build/config/android/rules.gni")
+}
+
 config("base_config") {
   configs = [
     # This target uses the ALLOCATOR_SHIM define.
@@ -355,6 +359,15 @@ target(link_target_type, "base") {
   }
 }
 
+if (is_android) {
+  java_cpp_enum("java_enums") {
+    sources = [
+      "encryption_scheme.h",
+      "video_codecs.h",
+    ]
+  }
+}
+
 static_library("test_support") {
   testonly = true
   sources = [