Remove WakefulBroadcastReceiver usage

app/build.gradle

@@ -1,12 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     buildToolsVersion "27.0.0"
 
     dependencies {
         compile 'com.android.support:support-annotations:27.0.0'
-        compile "com.android.support:support-core-utils:27.0.0"
         compile "com.android.support:support-core-ui:27.0.0"
         compile project(":terminal-view")
     }
@@ -14,7 +13,7 @@ android {
     defaultConfig {
         applicationId "com.termux"
         minSdkVersion 21
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 54
         versionName "0.54"
     }

app/src/main/java/com/termux/app/TermuxService.java

@@ -16,7 +16,6 @@ import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.PowerManager;
-import android.support.v4.content.WakefulBroadcastReceiver;
 import android.util.Log;
 import android.widget.ArrayAdapter;
 
@@ -157,11 +156,6 @@ public final class TermuxService extends Service implements SessionChangedCallba
             Log.e(EmulatorDebug.LOG_TAG, "Unknown TermuxService action: '" + action + "'");
         }
 
-        if ((flags & START_FLAG_REDELIVERY) == 0) {
-            // Service is started by WBR, not restarted by system, so release the WakeLock from WBR.
-            WakefulBroadcastReceiver.completeWakefulIntent(intent);
-        }
-
         // If this service really do get killed, there is no point restarting it automatically - let the user do on next
         // start of {@link Term):
         return Service.START_NOT_STICKY;