Fix gradle build variable quotes in config

Part of https://gitlab.com/gitlab-org/gitter/gitter-android-app/merge_requests/4

Previously it wouldn't build locally, only in CI.

Now it builds both locally and on CI

app/build.gradle

@@ -8,10 +8,10 @@ if (secretsPropertiesFile.exists()) {
 }
 // Otherwise read from environment variables, this happens in CI
 else {
-    secretProperties.setProperty("oauth_client_id", System.getenv('oauth_client_id'))
-    secretProperties.setProperty("oauth_client_secret", System.getenv('oauth_client_secret'))
-    secretProperties.setProperty("oauth_redirect_uri", System.getenv('oauth_redirect_uri'))
-    secretProperties.setProperty("google_project_id", System.getenv('google_project_id') ?: "null")
+    secretProperties.setProperty("oauth_client_id", "\"${System.getenv('oauth_client_id')}\"")
+    secretProperties.setProperty("oauth_client_secret", "\"${System.getenv('oauth_client_secret')}\"")
+    secretProperties.setProperty("oauth_redirect_uri", "\"${System.getenv('oauth_redirect_uri')}\"")
+    secretProperties.setProperty("google_project_id", "\"${System.getenv('google_project_id') ?: "null"}\"")
 }
 
 android {
@@ -25,10 +25,10 @@ android {
         versionCode 81
         versionName "3.2.0"
 
-        buildConfigField("String", "oauth_client_id", "\"${secretProperties['oauth_client_id']}\"")
-        buildConfigField("String", "oauth_client_secret", "\"${secretProperties['oauth_client_secret']}\"")
-        buildConfigField("String", "oauth_redirect_uri", "\"${secretProperties['oauth_redirect_uri']}\"")
-        buildConfigField("String", "google_project_id", "\"${secretProperties['google_project_id']}\"" ?: "null")
+        buildConfigField("String", "oauth_client_id", "${secretProperties['oauth_client_id']}")
+        buildConfigField("String", "oauth_client_secret", "${secretProperties['oauth_client_secret']}")
+        buildConfigField("String", "oauth_redirect_uri", "${secretProperties['oauth_redirect_uri']}")
+        buildConfigField("String", "google_project_id", "${secretProperties['google_project_id']}" ?: "null")
     }
     buildTypes {
         release {

build.gradle

@@ -13,7 +13,6 @@ buildscript {
     }
 }
 
-
 subprojects {
     group = 'im.gitter'
     version = '1.0'