Fix App Management mojom build dependency.

This CL is a speculative fix for flakes in OS Settings browser tests
that were being caused by mojo-lite files erroring at runtime.

The theorized mechanism of failure is that the build dependencies
were not set up correctly, and the os_settings_resources target picked
up an old version of the mojo-lite file before the
chrome/browser:resources target had a chance to run.

Bug: 1057389
Change-Id: Ib296133a4f90300b027c28205278fe79b3e55527
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094913
Commit-Queue: calamity <calamity@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#749532}

chrome/browser/BUILD.gn

@@ -5605,10 +5605,7 @@ grit("resources") {
   if (is_android) {
     deps +=
         [ "//chrome/browser/ui/webui/explore_sites_internals:mojo_bindings_js" ]
-  } else {
-    deps += [ "//chrome/browser/ui/webui/app_management:mojo_bindings_js" ]
   }
-
   if (is_chromeos) {
     deps += [
       "//chrome/browser/resources/chromeos/crostini_installer:polymer3_elements",
@@ -5618,6 +5615,7 @@ grit("resources") {
       "//chrome/browser/resources/chromeos/set_time_dialog:polymer3_elements",
       "//chrome/browser/resources/chromeos/smb_shares:polymer3_elements",
       "//chrome/browser/supervised_user:supervised_user_unscaled_resources",
+      "//chrome/browser/ui/webui/app_management:mojo_bindings_js",
       "//chrome/browser/ui/webui/chromeos/add_supervision:mojo_bindings_js",
       "//chrome/browser/ui/webui/chromeos/crostini_installer:mojo_bindings_js",
       "//chrome/browser/ui/webui/chromeos/crostini_upgrader:mojo_bindings_js",

chrome/browser/resources/BUILD.gn

@@ -292,13 +292,14 @@ if (!is_android) {
 
 if (is_chromeos) {
   grit("os_settings_resources") {
+    deps = [ "//chrome/browser/ui/webui/app_management:mojo_bindings_js" ]
     if (optimize_webui) {
       source = "settings/os_settings_resources_vulcanized.grd"
 
       # The .grd contains references to generated files.
       source_is_generated = true
 
-      deps = [ "//chrome/browser/resources/settings/chromeos:build" ]
+      deps += [ "//chrome/browser/resources/settings/chromeos:build" ]
 
       grit_flags = [
         "-E",