TV-LM: add launcher target for android TV (leanback)

app/build.gradle

@@ -24,7 +24,7 @@ android {
 
     defaultConfig {
         applicationId "org.galexander.sshd"
-        minSdkVersion 16
+        minSdkVersion 17
         targetSdkVersion 28
     }
 
@@ -38,4 +38,5 @@ android {
 }
 dependencies {
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    implementation 'androidx.leanback:leanback:1.0.0'
 }

app/src/main/AndroidManifest.xml

@@ -8,6 +8,8 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-feature android:name="android.software.leanback" android:required="false" />
+    <uses-feature android:name="android.hardware.touchscreen" android:required="false" />
     <application android:label="SimpleSSHD" android:icon="@drawable/icon"
 	  android:allowBackup="false" android:banner="@drawable/tvbanner">
         <activity android:name="SimpleSSHD" android:label="SimpleSSHD"
@@ -17,6 +19,14 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name="SimpleSSHDTV" android:label="SimpleSSHD"
+	    android:launchMode="singleTask"
+	    android:theme="@style/Theme.Leanback">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
+            </intent-filter>
+        </activity>
 	<activity android:name="Settings" android:label="Settings" />
 	<service android:name="SimpleSSHDService"
 	    android:label="SimpleSSHDService" />

app/src/main/java/org/galexander/sshd/SimpleSSHD.java

@@ -317,4 +317,8 @@ public class SimpleSSHD extends Activity
 	public void onRequestPermissionsResult(int code, String[] perms, int[] results) {
 		Prefs.set_requested();	/* whatever result, don't ask again */
 	}
+
+	public static boolean is_tv() {
+		return false;
+	}
 }

app/src/main/java/org/galexander/sshd/SimpleSSHDTV.java

@@ -0,0 +1,8 @@
+package org.galexander.sshd;
+
+public class SimpleSSHDTV extends SimpleSSHD
+{
+	public static boolean is_tv() {
+		return true;
+	}
+}