set target SDK to 23

qt/i2pd_qt/android/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <manifest package="org.purplei2p.i2pd" xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="2.8.0" android:versionCode="1" android:installLocation="auto">
-    <uses-sdk android:minSdkVersion="11"/>
+    <uses-sdk android:minSdkVersion="11" android:targetSdkVersion="23"/>
         <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
     <!-- <application android:hardwareAccelerated="true" -->
         <application android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="i2pd" android:icon="@drawable/icon">