[video_player] Remove -Werror from Android build (flutter#7776)

In flutter/plugins#3019 -Werror was incorrectly added directly to the plugin build itself, which impacts client builds. We've since updated our builds to set these flags on the project only when building our own example app, which gives us the CI benefits of this flag without burdening clients with restrictive build settings, so this is no longer needed.

Fixes flutter/flutter#148478

*Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.*

*List which issues are fixed by this PR. You must list at least one issue.*

packages/video_player/video_player_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.7.7
+
+* Removes the flag to treat warnings as errors in client builds.
+
 ## 2.7.6
 
 * Fixes a [bug](https://github.com/flutter/flutter/issues/154602) where

packages/video_player/video_player_android/android/build.gradle

@@ -1,6 +1,5 @@
 group 'io.flutter.plugins.videoplayer'
 version '1.0-SNAPSHOT'
-def args = ["-Xlint:deprecation","-Xlint:unchecked","-Werror"]
 
 buildscript {
     repositories {
@@ -20,10 +19,6 @@ rootProject.allprojects {
     }
 }
 
-project.getTasks().withType(JavaCompile){
-    options.compilerArgs.addAll(args)
-}
-
 apply plugin: 'com.android.library'
 
 android {

packages/video_player/video_player_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: video_player_android
 description: Android implementation of the video_player plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/video_player/video_player_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+video_player%22
-version: 2.7.6
+version: 2.7.7
 
 environment:
   sdk: ^3.5.0