Bump Android NDK to r19c (#25140)

Summary:
In 2019-6-4 version of Docker Android image, we've added Android NDK r19c. So this PR will change CI to use NDK r19c.

I'll create a PR to website once this merged.

Note: I tried to build RN with NDK 19 while I was setting up my laptop after format, and it worked.

## Changelog

[Android] [Changed] - Bump Android NDK to r19c
Pull Request resolved: https://github.com/facebook/react-native/pull/25140

Differential Revision: D15631301

Pulled By: cpojer

fbshipit-source-id: b9a5600df1dadeba328932b694493960b242c2f7

.appveyor/config.yml

@@ -1,13 +1,13 @@
 environment:
   ANDROID_HOME: "C:\\android-sdk-windows"
-  ANDROID_NDK: "C:\\android-sdk-windows\\android-ndk-r17c"
+  ANDROID_NDK: "C:\\android-sdk-windows\\android-ndk-r19c"
   ANDROID_BUILD_VERSION: 28
   ANDROID_TOOLS_VERSION: 28.0.3
 
   GRADLE_OPTS: -Dorg.gradle.daemon=false
 
   SDK_TOOLS_URL: https://dl.google.com/android/repository/sdk-tools-windows-3859397.zip
-  NDK_TOOLS_URL: https://dl.google.com/android/repository/android-ndk-r17c-windows-x86_64.zip
+  NDK_TOOLS_URL: https://dl.google.com/android/repository/android-ndk-r19c-windows-x86_64.zip
 
   matrix:
     - nodejs_version: 8

.circleci/config.yml

@@ -23,7 +23,7 @@ executors:
   reactnativeandroid:
     <<: *defaults
     docker:
-      - image: reactnativecommunity/react-native-android:2019-5-29
+      - image: reactnativecommunity/react-native-android:2019-6-4
     resource_class: "large"
     environment:
       - TERM: "dumb"

scripts/android-setup.sh

@@ -40,7 +40,7 @@ function getAndroidNDK {
   if [ ! -e $DEPS ]; then
     cd $NDK_HOME || exit
     echo "Downloading NDK..."
-    curl -o ndk.zip https://dl.google.com/android/repository/android-ndk-r17c-linux-x86_64.zip
+    curl -o ndk.zip https://dl.google.com/android/repository/android-ndk-r19c-linux-x86_64.zip
     unzip -o -q ndk.zip
     echo "Installed Android NDK at $NDK_HOME"
     touch $DEPS