Move keystore properties in own file

This allows to sync gradle.properties with git

.gitignore

@@ -42,7 +42,7 @@ buck-out/
 *.keystore
 !debug.keystore
 *.jks
-/android/gradle.properties
+/android/keystores/release.keystore.properties
 
 # fastlane
 #

android/app/build.gradle

@@ -124,6 +124,13 @@ def jscFlavor = 'org.webkit:android-jsc:+'
  */
 def enableHermes = project.ext.react.get("enableHermes", false);
 
+/**
+ * Load release keystore
+ */
+def keystorePropertiesFile = rootProject.file("keystores/release.keystore.properties");
+def keystoreProperties = new Properties()
+keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
 
@@ -156,12 +163,10 @@ android {
             keyPassword 'android'
         }
         release {
-            if (project.hasProperty('MYAPP_UPLOAD_STORE_FILE')) {
-                storeFile file(MYAPP_UPLOAD_STORE_FILE)
-                storePassword MYAPP_UPLOAD_STORE_PASSWORD
-                keyAlias MYAPP_UPLOAD_KEY_ALIAS
-                keyPassword MYAPP_UPLOAD_KEY_PASSWORD
-            }
+            storeFile file(keystoreProperties['UPLOAD_STORE_FILE'])
+            storePassword keystoreProperties['UPLOAD_STORE_PASSWORD']
+            keyAlias keystoreProperties['UPLOAD_KEY_ALIAS']
+            keyPassword keystoreProperties['UPLOAD_KEY_PASSWORD']
         }
     }
     buildTypes {

android/gradle.properties

@@ -0,0 +1,27 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+# Default value: -Xmx10248m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app's APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Version of flipper SDK to use with React Native
+FLIPPER_VERSION=0.37.0