Bump version to 15.0.0

Summary: $title

Reviewed By: joesus

Differential Revision: D39625406

fbshipit-source-id: 5501a7605749084296da612dc766f26ddba3ba4d

Author: mingcaozhang

CHANGELOG.md

@@ -6,12 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-### Changed
 
+## [15.0.0]
+### Changed
 - We now use jacoco to gather code coverage on debug builds. If you are building from source instead of using releases from maven,
   you may run into an issue where debug builds crash on launch.
   The issue and solution are well-documented in https://github.com/jacoco/jacoco/issues/968
-  
+- Migrated the gradle files (excluding `maven.gradle` and sample projects) from Groovy to Kotlin.
+
 ## [14.1.1]
 ### Fixed
 - Fixed the issue which caused AndroidX activity/fragment 1.5.0+ to break the Facebook Login Android SDK Flow if the Facebook app is not installed.
@@ -438,7 +440,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 <!-- Links -->
 
-[Unreleased]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-14.1.1...HEAD
+[Unreleased]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-15.0.0...HEAD
+[15.0.0]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-14.1.1...sdk-version-15.0.0
 [14.1.1]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-14.1.0...sdk-version-14.1.1
 [14.1.0]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-14.0.0...sdk-version-14.1.0
 [14.0.0]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-13.2.0...sdk-version-14.0.0
@@ -494,3 +497,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [4.41.0]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-4.40.0...sdk-version-4.41.0
 [4.40.0]: https://github.com/facebook/facebook-android-sdk/compare/sdk-version-4.39.0...sdk-version-4.40.0
 
+

facebook-core/src/main/java/com/facebook/FacebookSdkVersion.kt

@@ -21,5 +21,5 @@
 package com.facebook
 
 internal object FacebookSdkVersion {
-  const val BUILD = "14.1.1"
+  const val BUILD = "15.0.0"
 }

facebook-core/src/main/java/com/facebook/internal/ServerProtocol.kt

@@ -92,7 +92,7 @@ object ServerProtocol {
   // URL components
   private const val GRAPH_VIDEO_URL_FORMAT = "https://graph-video.%s"
   private const val GRAPH_URL_FORMAT = "https://graph.%s"
-  @JvmStatic fun getDefaultAPIVersion() = "v14.0"
+  @JvmStatic fun getDefaultAPIVersion() = "v15.0"
 
   @JvmStatic
   fun getErrorsProxyAuthDisabled(): Collection<String> =