media: Fix double compiling gpu/ipc/common

//media/gpu is depending directly on ipc_common_sources which ends up
compiling a separate copy of ipc_common_sources into media_gpu in
component builds. Fix this by depending on the group instead.

This fixes any crashes related to CheckFeatureIdentity failing on
AImageReader in component build.

Fixed: 1144945
Change-Id: Ice2758de77f704103e792242449b985b3937e570
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2553969
Commit-Queue: Frank Liberato <liberato@chromium.org>
Auto-Submit: Bo <boliu@chromium.org>
Reviewed-by: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830221}

media/gpu/BUILD.gn

@@ -146,7 +146,7 @@ component("gpu") {
       "//gpu/ipc/common:android_image_reader_utils",
 
       # TODO(crbug.com/789435): This can be removed once CdmManager is removed.
-      "//gpu/ipc/common:ipc_common_sources",
+      "//gpu/ipc/common",
       "//media/mojo:buildflags",
       "//services/service_manager/public/cpp:cpp",
       "//ui/gl:gl_jni_headers",