Adds android_emulator.md

Change-Id: Id4ab9fafa2546b42a0094466c3f4cbefa6a65a56
Reviewed-on: https://chromium-review.googlesource.com/1102483
Reviewed-by: Eric Stevenson <[email protected]>
Commit-Queue: agrieve <[email protected]>
Cr-Commit-Position: refs/heads/master@{#567673}
diff --git a/docs/android_build_instructions.md b/docs/android_build_instructions.md
index b0170f4..69e23865 100644
--- a/docs/android_build_instructions.md
+++ b/docs/android_build_instructions.md
@@ -352,6 +352,11 @@
 
 This will make `chrome_public_apk` build in incremental mode.
 
+## Installing and Running Chromium on an Emulator
+
+Running on an emulator is the same as on a device. Refer to
+[android_emulators.md](android_emulators.md) for setting up emulators.
+
 
 ## Tips, tricks, and troubleshooting