Fix package name of Android color blob detection sample

samples/android/color-blob-detection/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="org.opencv.example.colorblobdetect"
+          package="org.opencv.samples.colorblobdetect"
           android:versionCode="21"
-          android:versionName="2.1" >
+          android:versionName="2.1">
 
     <application android:label="@string/app_name" android:icon="@drawable/icon">
         <activity android:name="ColorBlobDetectionActivity"
@@ -31,4 +31,4 @@
     <uses-feature android:name="android.hardware.camera.front" android:required="false"/>
     <uses-feature android:name="android.hardware.camera.front.autofocus" android:required="false"/>
 
-</manifest>
\ No newline at end of file
+</manifest>