[AW] Add missing //aw/apk dependency to webview libraries

This was accidentally removed in crrev.com/c/1880070, and causes a
crash when launching the license activity. I tested the aforementioned
CL by selecting "System WebView licenses" in the Settings UI, but it
turns out that launches the first android.settings.WEBVIEW_LICENSE
activity it finds in the system image, so it wasn't actually testing my
change.

This also removes an about_ui_android dependency from
//aw:libwebviewchromium since that's already in //aw:apk where it
belongs.

Test: adb shell am start -n com.google.android.apps.chrome/org.chromium.android_webview.app.LicenseActivity
Bug: 934152
Change-Id: I8115d6bd5291249da0b6c625c5f210b0d953c62b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1904615
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714609}

android_webview/BUILD.gn

@@ -408,8 +408,8 @@ grit("generate_components_strings") {
 
 shared_library("libwebviewchromium") {
   deps = [
+    "//android_webview/apk",
     "//android_webview/lib:webview_entry_point",
-    "//components/about_ui:about_ui_android",
   ]
   configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
   configs += [ "//build/config/android:hide_all_but_jni" ]
@@ -441,6 +441,7 @@ template("webview_library") {
   chrome_common_shared_library(target_name) {
     forward_variables_from(invoker, "*")
     deps = [
+      "//android_webview/apk",
       "//android_webview/lib:webview_entry_point",
     ]
     is_webview = true