Evonet: Add mobile devnet build instructions (#422)

README.md

@@ -3,7 +3,7 @@ Welcome to _Dash Wallet_, a standalone Dash payment app for your Android device!
 This project contains several sub-projects:
 
  * __wallet__:
-     The Android app itself. This is probably what you're searching for.
+     The Android app itself. This is probably what you're searching for. [wallet README](wallet/README.md)
  * __common__:
      Contains common components used by integrations.
  * __uphold-integration__

wallet/README.md

@@ -48,7 +48,7 @@ The app can send extensive debug information. Use **Options > Settings > Report
 In the generated e-mail, replace the support address with yours.
 
 
-### BUILDING THE DEVELOPMENT VERSION
+### BUILDING THE DEVELOPMENT VERSION (TESTNET)
 
 It's important to know that the development version uses Testnet, is debuggable and the wallet file
 is world readable/writeable. The goal is to be able to debug easily.
@@ -100,6 +100,55 @@ If installation fails, make sure "Developer options" and "USB debugging" are ena
 connection is established.
 
 
+### BUILDING THE DEVNET VERSION (MOBILE)
+
+It's important to know that this development version uses Mobile Devnet, is debuggable and the wallet file
+is world readable/writeable. The goal is to be able to debug easily.
+
+The `mobile` flavor builds for the Mobile Devnet.
+
+	# first time only
+	git clone -b evonet-develop https://github.com/dashevo/dash-wallet.git dash-wallet
+	cd dash-wallet
+	git pull
+	git submodule init
+    git submodule update
+    cd ..
+
+	git clone -b master https://github.com/dashevo/android-dpp.git android-dpp
+	cd android-dpp
+	gradlew build
+    cd ..
+
+	git clone -b master https://github.com/dashevo/dapi-client-android dapi-client-android
+	cd dapi-client-android
+	gradlew build
+	cd ..
+
+    git clone -b master https://github.com/dashevo/android-dashpay.git android-dashpay
+    cd android-dashpay
+    gradlew build
+    cd ..
+
+    # optional
+    git clone -b evonet https://github.com/dashevo/dashj.git dashj
+    cd dashj
+    mvn clean install -DskipTests
+    cd ..
+
+	# each time or build in Android Studio
+	cd dash-wallet
+	git pull
+    gradle clean assembleMobileDebug -x test
+
+To install the app on your Android device, use:
+
+    # first time only
+    sudo apt install android-tools-adb
+
+	# each time
+	adb install wallet/build/outputs/apk/dash-wallet-mobile-debug.apk
+
 
 ### BUILDING THE PRODUCTION VERSION
 
@@ -135,6 +184,8 @@ All flavors (debug and release) will be at:  wallet/build/outputs/apk
 ### SETTING UP FOR DEVELOPMENT
 
 You should be able to import the project into Android Studio, as it uses Gradle for building.
+* Set the build variant on the wallet module to the required flavor (mobileDebug for mobile devnet)
+* From Tools | SDK Manager, select Android SDK Build Tools version 28 and NDK (side by side) version 16 or above
 
 
 ### TRANSLATIONS