Fall back to legacy add to homescreen behavior on non-GMS device or GMS isn't availabe.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java

Index: chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
index 149a3e2c5e0b5dd9fc75490975d5c5721627bc55..a32ff99e8f255816a1676f2fa5ecd27c53973032 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/webapps/WebApkInstaller.java
@@ -20,6 +20,8 @@ import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.browser.ChromeApplication;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.banners.InstallerDelegate;
+import org.chromium.chrome.browser.externalauth.ExternalAuthUtils;
+import org.chromium.chrome.browser.externalauth.UserRecoverableErrorHandler;
 import org.chromium.chrome.browser.util.IntentUtils;
 
 import java.io.File;
@@ -62,8 +64,11 @@ public class WebApkInstaller {
     }
 
     @CalledByNative
-    private boolean hasGooglePlayWebApkInstallDelegate() {
-        return mGooglePlayWebApkInstallDelegate != null;
+    private boolean canUseGooglePlayInstallService() {
+        return mGooglePlayWebApkInstallDelegate != null
+                && ExternalAuthUtils.getInstance().canUseGooglePlayServices(
+                        ContextUtils.getApplicationContext(),
+                        new UserRecoverableErrorHandler.Silent());
     }
 
     @CalledByNative