NDK version from gradle.properties

Summary:
^

With these changes, we can build the project by overriding these version from a gradle build.

    ./gradlew :assembleDebug -DNDK_VERSION=21.4.7075529 -DFBJNI_VERSION=0.2.2

Reviewed By: passy

Differential Revision: D43879098

fbshipit-source-id: 8790aa12a086373194d45687d70ceb73b07713b9

build.gradle

@@ -48,8 +48,8 @@ ext {
     minSdkVersion = 15
     targetSdkVersion = 31
     compileSdkVersion = 31
-    buildToolsVersion = '30.0.3'
+    buildToolsVersion = "30.0.3"
-    ndkVersion = '23.0.7599858'
+    ndkVersion = "$NDK_VERSION"
 }
 
 ext.deps = [

gradle.properties

@@ -20,6 +20,8 @@ POM_ISSUES_URL=https://github.com/facebook/flipper/issues/
 LITHO_VERSION=0.44.0
 ANDROIDX_VERSION=1.3.0
 KOTLIN_VERSION=1.6.20
+# NDK
+NDK_VERSION=23.0.7599858
 # Gradle internals
 org.gradle.internal.repository.max.retries=10
 org.gradle.internal.repository.initial.backoff=1250

react-native/ReactNativeFlipperExample/android/build.gradle

@@ -12,7 +12,7 @@ buildscript {
         minSdkVersion = 21
         compileSdkVersion = 31
         targetSdkVersion = 31
-        ndkVersion = '23.0.7599858'
+        ndkVersion = "$NDK_VERSION"
     }
     repositories {
         google()