update Android toolchain, remove mips support

android/Snapcast/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion '26.0.2'
+    compileSdkVersion 27
+    buildToolsVersion '27.0.3'
 
     defaultConfig {
         applicationId "de.badaix.snapcast"
         minSdkVersion 16
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1200
         versionName "0.12.0"
         multiDexEnabled true
@@ -27,9 +27,9 @@ android {
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:26.1.0'
-    compile 'com.android.support:cardview-v7:26.1.0'
-    compile 'com.android.support:support-v4:26.1.0'
+    compile 'com.android.support:appcompat-v7:27.0.2'
+    compile 'com.android.support:cardview-v7:27.0.2'
+    compile 'com.android.support:support-v4:27.0.2'
     //    compile 'com.android.support:recyclerview-v7:23.1.1'
-    compile 'com.android.support:design:26.1.0'
+    compile 'com.android.support:design:27.0.2'
 }