added gpl license header

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

src/main/java/com/nextcloud/client/device/DeviceInfo.kt

@@ -1,3 +1,24 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ *
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.nextcloud.client.device
 
 import android.os.Build

src/main/java/com/nextcloud/client/device/DeviceModule.kt

@@ -1,3 +1,24 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ *
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.nextcloud.client.device
 
 import android.content.Context

src/main/java/com/nextcloud/client/device/PowerManagementService.kt

@@ -1,3 +1,24 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ *
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.nextcloud.client.device
 
 /**

src/main/java/com/nextcloud/client/device/PowerManagementServiceImpl.kt

@@ -1,3 +1,24 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ *
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.nextcloud.client.device
 
 import android.annotation.TargetApi

src/test/java/com/nextcloud/client/device/TestPowerManagementService.kt

@@ -1,11 +1,30 @@
+/*
+ * Nextcloud Android client application
+ *
+ * @author Chris Narkiewicz
+ *
+ * Copyright (C) 2019 Chris Narkiewicz <hello@ezaquarii.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
 package com.nextcloud.client.device
 
 import android.os.Build
 import android.os.PowerManager
-import com.nhaarman.mockitokotlin2.never
-import com.nhaarman.mockitokotlin2.verify
-import com.nhaarman.mockitokotlin2.whenever
-import org.junit.Assert.*
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith