Remove vulkan from most build variants

platform_tools/android/apps/build.gradle

 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 
 buildscript {
     repositories {
         jcenter()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:2.1.0'
 
@@ skipping 93 matching lines @@
         deviceType = "mips64"
     }
 
     if (deviceType != null) {
         cmdLine += " -d " + deviceType
     }
 
     if (variant.name.endsWith("Release")) {
         cmdLine += " --release"
     }
+
+    if (variant.name.indexOf("vulkan") != -1) {
+        cmdLine += " --vulkan"
+    }
     return cmdLine
 }