Connection Tracking, Firewall scree refractor and other bug fixes

Connection Tracking:
* Introduced new screen to track all the app connections.
* isBlock method invocation from tunnel2socks will have the details of the connections. Those connections are added to the connection tracking screen.
* Conn Tracking Screen will have the details of the app, timestamp, IP, port, type of connection, and flag.
* Pending - -DNS UDP connection to an IP address.

#3

Firewall Screen:
* Removed the category and app list from firewall screen
* Introduced expandable list view which will show the app category and list of apps in the category.
* Livedata mapping with the database. (AppInfoDAO and CategoryInfoDAO).
* Prompt dialog box when an app with same UID is blocked/unblocked. Dialog box will contain list of apps blocked/unblocked along with the selected app.
* Included System apps also in firewall screen

#4
#14

About Page
* Introduced new screen in HomeScreenActivity as a fragment.
* Screen consists of Links, Contact and telegram group link.

Bug Fixes:
* Query Tracker - Median latency value was earlier added in a sorted list which is now modified to arraylist and the median is calculated in the arraylist.
* Webview - Destroying the webview activity when the user .
* Live data - Home screen tile values are updated by LiveData instead of Handlers.
	#8
* Firewall Implementation for 8+ - UID check is made against the blocked list and return boolean value whether to block/allow.
	#31
	#30
* DNS change delay - Delay of 1 sec has been introduced when the DNS URL's are changed. This is to avoid rapid change of URL's
	#35
* Brave Mode delay - Changing the modes in home screen now has a delay of 1 sec.
* Screen lock -
	#29
* UI - Various UI corrections and modification in strings.xml file.


Former-commit-id: 9734485

app/build.gradle

@@ -33,8 +33,8 @@ android {
         vectorDrawables.useSupportLibrary = true
         minSdkVersion 26
         targetSdkVersion 29
-        versionCode 3
-        versionName "0.3"
+        versionCode 6
+        versionName "0.4.2"
        /* splits {
              abi {
                  enable true
@@ -100,9 +100,6 @@ dependencies {
     // https://mvnrepository.com/artifact/org.jsoup/jsoup
     implementation group: 'org.jsoup', name: 'jsoup', version: '1.8.3'
 
-
     // For go-tun2socks
     implementation project(":tun2socks")
-
-    testImplementation "androidx.room:room-testing:$room_version"
 }

app/src/main/AndroidManifest.xml

@@ -13,6 +13,7 @@
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
+        android:usesCleartextTraffic="true"
         android:roundIcon="@drawable/ic_launcher"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
@@ -21,6 +22,7 @@
             android:theme="@style/AppTheme" />
         <activity
             android:name=".ui.PermissionManagerActivity"
+            android:launchMode="singleInstance"
             android:theme="@style/AppTheme" />
         <activity
             android:name=".ui.HomeScreenActivity"
@@ -32,19 +34,27 @@
         <activity
             android:name=".ui.QueryDetailActivity"
             android:theme="@style/AppTheme"/>
+
         <activity android:name=".ui.WelcomeActivity"
+            android:launchMode="singleTask"
             android:theme="@style/AppTheme">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <activity android:name=".ui.AppInfoActivity"
+            android:launchMode="singleInstance"
         android:theme="@style/AppTheme"/>
         <activity android:name=".ui.FaqWebViewActivity"
+            android:launchMode="singleInstance"
             android:theme="@style/AppTheme"/>
         <activity android:name=".sample.SampleExpandable"
-                    android:theme="@style/AppTheme"/>
+            android:launchMode="singleInstance"
+            android:theme="@style/AppTheme"/>
+        <activity
+            android:name=".ui.ConnectionTrackerActivity"
+            android:theme="@style/AppTheme" />
 
 
         <!--<receiver
@@ -133,7 +143,7 @@
             android:exported="false"
             android:stopWithTask="false">
             <intent-filter>
-                <action android:name="com.celzero.bravedns.Receiver.ScreenLockService.ACTION_START_SERVICE"/>
+                <action android:name="com.celzero.bravedns.receiver.DeviceLockService.ACTION_START_SERVICE"/>
             </intent-filter>
         </service>