upgrade Android gradle plugin, Kotlin and jetifier (#1468)

app/src/main/java/com/keylesspalace/tusky/entity/DeletedStatus.kt

@@ -29,6 +29,6 @@ data class DeletedStatus(
         @SerializedName("created_at") val createdAt: Date
 ) {
     fun isEmpty(): Boolean {
-        return text == null && attachments == null;
+        return text == null && attachments == null
     }
 }

app/src/main/java/com/keylesspalace/tusky/entity/History.kt

@@ -1,14 +0,0 @@
-package com.keylesspalace.tusky.entity
-
-import com.google.gson.annotations.SerializedName
-
-data class History(
-        @field:SerializedName("day")
-        val day: String,
-
-        @field:SerializedName("uses")
-        val uses: Int,
-
-        @field:SerializedName("accounts")
-        val accounts: Int
-)

app/src/main/java/com/keylesspalace/tusky/util/MultiListing.kt

@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.keylesspalace.tusky.util
-
-import androidx.lifecycle.LiveData
-import androidx.paging.PagedList
-
-/**
- * Data class that is necessary for a UI to show a listing and interact w/ the rest of the system
- */
-data class MultiListing(
-        val pagedLists: List<LiveData<PagedList<Any>>>,
-        // represents the network request status to show to the user
-        val networkState: LiveData<NetworkState>,
-        // represents the refresh status to show to the user. Separate from networkState, this
-        // value is importantly only when refresh is requested.
-        val refreshState: LiveData<NetworkState>,
-        // refreshes the whole data and fetches it from scratch.
-        val refresh: () -> Unit,
-        // retries any failed requests.
-        val retry: () -> Unit)

app/src/main/java/com/keylesspalace/tusky/util/NotificationTypeConverter.kt

@@ -34,7 +34,7 @@ fun deserialize(data: String?): Set<Notification.Type> {
     val ret = HashSet<Notification.Type>()
     data?.let {
         val array = JSONArray(data)
-        for (i in 0..(array.length() - 1)) {
+        for (i in 0 until array.length()) {
             val item = array.getString(i)
             val type = Notification.Type.byString(item)
             if (type != Notification.Type.UNKNOWN)

build.gradle

@@ -1,14 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.41'
+    ext.kotlin_version = '1.3.50'
     repositories {
         jcenter()
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build.jetifier:jetifier-processor:1.0.0-beta05'
-        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.android.tools.build.jetifier:jetifier-processor:1.0.0-beta06'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }