android build: Update to AndroidX.

android/app/build.gradle

@@ -207,12 +207,12 @@ dependencies {
     implementation project(':react-native-vector-icons')
     implementation fileTree(dir: "libs", include: ["*.jar"])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     implementation "com.google.firebase:firebase-messaging:17.3.4"
     implementation "me.leolin:ShortcutBadger:1.1.16@aar"
     implementation "com.facebook.react:react-native:+"  // From node_modules
     implementation 'com.facebook.fresco:animated-gif:1.10.0' // For animated GIF support
-    implementation "com.android.support:customtabs:${rootProject.ext.supportLibVersion}"
+    implementation 'androidx.browser:browser:1.0.0'
     addUnimodulesDependencies()
 
     testImplementation 'junit:junit:4.12'

android/app/src/main/java/com/zulipmobile/CustomTabsAndroid.java

@@ -3,7 +3,7 @@
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
 import android.net.Uri;
-import android.support.customtabs.CustomTabsIntent;
+import androidx.browser.customtabs.CustomTabsIntent;
 import android.widget.Toast;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.bridge.ReactContextBaseJavaModule;

android/app/src/main/java/com/zulipmobile/CustomTabsHelper.java

@@ -3,7 +3,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 import java.util.List;
 
 /**

android/app/src/main/java/com/zulipmobile/notifications/NotificationsModule.java

@@ -1,7 +1,7 @@
 package com.zulipmobile.notifications;
 
 import android.os.Bundle;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 import android.util.Log;
 import com.facebook.react.bridge.*;
 import com.google.firebase.iid.FirebaseInstanceId;

android/build.gradle

@@ -21,8 +21,6 @@ buildscript {
         //   https://developer.android.com/studio/releases/platforms
         // Do edit .travis.yml when updating this.
         compileSdkVersion = 29
-
-        supportLibVersion = "28.0.0"
     }
     repositories {
         google()

android/gradle.properties

@@ -16,3 +16,6 @@
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+
+android.enableJetifier=true
+android.useAndroidX=true

package.json

@@ -114,6 +114,7 @@
     "jest-environment-jsdom": "^24.9.0",
     "jest-environment-jsdom-global": "^1.2.0",
     "jest-extended": "^0.11.2",
+    "jetifier": "^1.6.5",
     "lolex": "^5.1.1",
     "metro-react-native-babel-preset": "^0.54.1",
     "prettier": "^1.18.2",

tools/postinstall

@@ -21,6 +21,12 @@ EOF
     pod install --project-directory="$ROOT_DIR/ios"
 }
 
+jetify() {
+    node_modules/.bin/jetify
+}
+
 pod_install
 
+jetify
+
 echo "tools/postinstall finished with no errors!"

yarn.lock

@@ -5568,6 +5568,11 @@ jest@^24.9.0:
     import-local "^2.0.0"
     jest-cli "^24.9.0"
 
+jetifier@^1.6.5:
+  version "1.6.5"
+  resolved "https://registry.yarnpkg.com/jetifier/-/jetifier-1.6.5.tgz#ea87324a4230bef20a9651178ecab978ee54a8cb"
+  integrity sha512-T7yzBSu9PR+DqjYt+I0KVO1XTb1QhAfHnXV5Nd3xpbXM6Xg4e3vP60Q4qkNU8Fh6PHC2PivPUNN3rY7G2MxcDQ==
+
 js-levenshtein@^1.1.3:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/js-levenshtein/-/js-levenshtein-1.1.6.tgz#c6cee58eb3550372df8deb85fad5ce66ce01d59d"