Android: Strip out WearOS-specific appcompat resources

They are unused since Chrome doesn't run on Wear OS.

Bug: None
Change-Id: I0282de56b7c35d4e651543a8cf649b1fe259a227
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154823
Commit-Queue: Theresa  <twellington@chromium.org>
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760557}

chrome/android/chrome_public_apk_tmpl.gni

@@ -156,14 +156,11 @@ template("chrome_public_common_apk_or_module_tmpl") {
     }
     target_sdk_version = android_sdk_version
 
-    # Match drawables, but not mipmaps.
+    # Strip xxxhdpi images to save size. It's extremely difficult to see the
+    # difference without magnification.
     resource_exclusion_regex = "drawable[^/]*-xxxhdpi"
-    if (min_sdk_version >= 21) {
-      # Resources used by AndroidManifest.xml only for pre-21.
-      resource_exclusion_regex += "|app_single_page_icon"
-    }
 
-    # Exception rationale in https://crbug.com/691733.
+    # Exceptions (rationale in https://crbug.com/691733):
     resource_exclusion_exceptions = [
       "*shadow*",  # Combination of gradient & transparency cause pixelation.
       "*.9.*",  # Most nine-patches contain shadows.
@@ -172,6 +169,14 @@ template("chrome_public_common_apk_or_module_tmpl") {
       "*ic_group_*",  # Appear only in xxxhdpi.
     ]
 
+    if (min_sdk_version >= 21) {
+      # Resources used by AndroidManifest.xml only for pre-21.
+      resource_exclusion_regex += "|app_single_page_icon"
+    }
+
+    # Remove WearOS resources (a couple exist in appcompat).
+    resource_exclusion_regex += "|-watch\b"
+
     if (!_is_monochrome) {
       product_config_java_packages = [ "org.chromium.chrome.browser" ]
     }