[WebLayer] Support prerender API starting M87

Per code review feedback here:
https://chromium-review.googlesource.com/c/chromium/src/+/2470634/comment/fee3ad23_a4607e7f/

the API was introduced for M88 first.
Once the API implementation has been cherry-picked to M87, this change
will land, supporting it M87 onwards.

Bug: 1136091
Change-Id: I9544c97faf807b5c59e9d4113768804e0fad96d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2489999
Commit-Queue: Mugdha Lakhani <nator@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820866}

weblayer/browser/android/javatests/src/org/chromium/weblayer/test/PrerenderControllerTest.java

@@ -53,7 +53,7 @@ public class PrerenderControllerTest {
     @Test
     @SmallTest
     @Feature({"WebLayer"})
-    @MinWebLayerVersion(88)
+    @MinWebLayerVersion(87)
     public void testAddingPrerender() throws Exception {
         TestWebServer testServer = TestWebServer.start();
         testServer.setRequestHandler(mRequestHandler);

weblayer/browser/java/org/chromium/weblayer_private/interfaces/IPrerenderController.aidl

@@ -5,6 +5,6 @@
 package org.chromium.weblayer_private.interfaces;
 
 interface IPrerenderController {
-  // Since 88
+  // Since 87
   void prerender(in String url) = 0;
 }

weblayer/browser/java/org/chromium/weblayer_private/interfaces/IProfile.aidl

@@ -45,7 +45,5 @@ interface IProfile {
 
   // Added in Version 87.
   void setUserIdentityCallbackClient(IUserIdentityCallbackClient client) = 13;
-
-  // Added in Version 88.
   IPrerenderController getPrerenderController() = 15;
 }

weblayer/public/java/org/chromium/weblayer/PrerenderController.java

@@ -21,7 +21,7 @@ import org.chromium.weblayer_private.interfaces.IProfile;
  * not execute Javascript or render any part of the page in advance. For more information on
  * NoStatePrefetch, see https://developers.google.com/web/updates/2018/07/nostate-prefetch.
  *
- * @since 88
+ * @since 87
  */
 public class PrerenderController {
     private final IPrerenderController mImpl;

weblayer/public/java/org/chromium/weblayer/Profile.java

@@ -80,7 +80,7 @@ public class Profile {
         mName = name;
         mImpl = impl;
         mCookieManager = CookieManager.create(impl);
-        if (WebLayer.getSupportedMajorVersionInternal() >= 88) {
+        if (WebLayer.getSupportedMajorVersionInternal() >= 87) {
             mPrerenderController = PrerenderController.create(impl);
         } else {
             mPrerenderController = null;
@@ -208,11 +208,11 @@ public class Profile {
     /**
      * Gets the prerender controller for this profile.
      *
-     * @since 88
+     * @since 87
      */
     @NonNull
     public PrerenderController getPrerenderController() {
-        if (WebLayer.getSupportedMajorVersionInternal() < 88) {
+        if (WebLayer.getSupportedMajorVersionInternal() < 87) {
             throw new UnsupportedOperationException();
         }