Remove IWebViewUpdateService.isFallbackPackage.

All callers have been updated to no longer depend on this.

Bug: 129470358
Test: m checkbuild
Change-Id: Iff88e2825a9d1406b5d8f100ddcc5a11bdff2e68

core/java/android/webkit/IWebViewUpdateService.aidl

@@ -70,13 +70,6 @@ interface IWebViewUpdateService {
      */
     PackageInfo getCurrentWebViewPackage();
 
-    /**
-     * Used by Settings to determine whether a certain package can be enabled/disabled by the user -
-     * the package should not be modifiable in this way if it is a fallback package.
-     */
-    @UnsupportedAppUsage
-    boolean isFallbackPackage(String packageName);
-
     /**
      * Used by Settings to determine whether multiprocess is enabled.
      */

services/core/java/com/android/server/webkit/WebViewUpdateService.java

@@ -240,11 +240,6 @@ public class WebViewUpdateService extends SystemService {
             return WebViewUpdateService.this.mImpl.getCurrentWebViewPackage();
         }
 
-        @Override // Binder call
-        public boolean isFallbackPackage(String packageName) {
-            return false;
-        }
-
         @Override // Binder call
         public boolean isMultiProcessEnabled() {
             return WebViewUpdateService.this.mImpl.isMultiProcessEnabled();