Android: consolidate support components for embedders

Moves web_contents_delegate_android under embedder_support to
consolidate all the support components for embedders. The package path
is org.chromium.embedder_support.delegate. Now the component
has 4 main targets for embedders:
 - media
 - view
 - content_view
 - web_contents_delegate

Note:

- The choice of 'delegate' in the package name of WebContentsDelegateAndroid
  is just to avoid having WCDA repeated in the path. (import org.chromium
  .embedder_support.web_contents_delegate_android.WebContentsDelegateAndroid
   looked odd to me).
- Got rid of 'android' wherever it is repeated in the path, and the deletion
  won't cause confusion.
  e.g. web_contents_delegate_android_java -> web_contents_delegate_java
- Needs changes in the internal repo as well
  https://chrome-internal-review.googlesource.com/c/clank/internal/apps/+/646448


Change-Id: I44c25435c32330439ffa765d80df45b02d0694b1
Reviewed-on: https://chromium-review.googlesource.com/1118926
Reviewed-by: Bo <[email protected]>
Reviewed-by: Scott Violet <[email protected]>
Reviewed-by: Tommy Nyquist <[email protected]>
Reviewed-by: Cait Phillips <[email protected]>
Reviewed-by: agrieve <[email protected]>
Commit-Queue: Jinsuk Kim <[email protected]>
Cr-Commit-Position: refs/heads/master@{#574401}
diff --git a/docs/chromoting_android_hacking.md b/docs/chromoting_android_hacking.md
index 53ac53c..834b5e2 100644
--- a/docs/chromoting_android_hacking.md
+++ b/docs/chromoting_android_hacking.md
@@ -54,7 +54,7 @@
 <classpathentry kind="src" path="components/cronet/android/sample/src"/>
 <classpathentry kind="src" path="components/cronet/android/sample/javatests/src"/>
 <classpathentry kind="src" path="components/autofill/core/browser/android/java/src"/>
-<classpathentry kind="src" path="components/web_contents_delegate_android/java/src"/>
+<classpathentry kind="src" path="components/embedder_support/android/java/src"/>
 <classpathentry kind="src" path="components/dom_distiller/android/java/src"/>
 <classpathentry kind="src" path="components/navigation_interception/android/java/src"/>
 <classpathentry kind="src" path="ui/android/java/src"/>