Include previous Wikimedia hackathon (2018) task, peer review, to codebase (#2602)

* Add new activity to manifest

* Create review activity layout base

* Add a new menu item to drawer for peer review

* Add a top menu with randomizer icon to review activity

* Add strings for review button

* Add activity to ActivityBuilderModule for injection

* Add a new drawer item to start review acitivty

* Create base of the Review Activity

* Add fragment pager

* Add new fragment for injection

* Create a fragment pager layout

* Wikimedia hackathon 2018 (#1533)

* First draft of fn to get random recent image

* Use log entries for requests to beta, try to connect refresh button

FIXME: runs http request on main thread, breaks

* Tweak button connection

* Add ReviewController class

* Fix fragments

* Wmhack2018 (#1534)

* tiny fixes

* Load pictures into activities

* Re-use same class for all review fragments (#1537)

And try to add pager indicator

* [WIP] category check

* [WIP] add on-click actions to ReviewActivity

* [WIP] add SendThankTask

* Make it beautiful

* Add some category stuff back in to review (#1538)

* Use standalone category extraction code in MediaDataExtractor

* Add categories to category review page

* Change category question text sizes

* Call randomizer whenever the activity is ready

* Add progressbar

* [WIP] add DeleteTask.askReasonAndExecute

* Fix refresh button string

* Typo: "nominate *for* deletion"

* Add formatting to categories and put them in the same textView

* Pass context and adapters as parameters to controller

* Add actions to controller

* Make everyting work

* Add another fragment to thank

* Fix npe

* Add missing execute method

* Some codes

* Add a funy text

* More random recent image selection (#1542)

time-based randomness is biased - if someone uploaded 100 images in
hour, one week ago, and I select a random point in time, their last
image is way more likely to come up than anything else.

With this, there is still bias towards choosing one of the last N
in any burst of uploads (where N is the number of recent changes
fetched) but it's a bit better than before.

* Create Revision class

* Add meaningluf strings

* Error handling for review image/category fetch (#1543)

* Add information layout for username and filename

* Use Single to get firstRevision

* try to add username and filename

* Ensure caption is shown on every review fragment

* Fix build

* Fixes missing import

* Change button text,show current category, add skip image button

* Modify texts, fix night mode issues

* Positive Wording

* fix landscape issue

* Add checkbox popup,rewording

* Spelling Correction

* Fix merge

* Remove commented out code, use lambda

* Simplify toolbar include

app/src/main/res/drawable/ic_check_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M9,16.17L4.83,12l-1.42,1.41L9,19 21,7l-1.41,-1.41z"/>
+</vector>

app/src/main/res/drawable/ic_refresh_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M17.65,6.35C16.2,4.9 14.21,4 12,4c-4.42,0 -7.99,3.58 -7.99,8s3.57,8 7.99,8c3.73,0 6.84,-2.55 7.73,-6h-2.08c-0.82,2.33 -3.04,4 -5.65,4 -3.31,0 -6,-2.69 -6,-6s2.69,-6 6,-6c1.66,0 3.14,0.69 4.22,1.78L13,11h7V4l-2.35,2.35z"/>
+</vector>

app/src/main/res/drawable/tab_indicator_default.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape
+            android:innerRadius="0dp"
+            android:shape="ring"
+            android:thickness="2dp"
+            android:useLevel="false">
+            <solid android:color="@android:color/darker_gray"/>
+        </shape>
+    </item>
+</layer-list>

app/src/main/res/drawable/tab_indicator_selected.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape android:innerRadius="0dp"
+    android:shape="ring"
+    android:thickness="4dp"
+    android:useLevel="false"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/commons_app_blue_dark"/>
+</shape>

app/src/main/res/drawable/tab_selector.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:drawable="@drawable/tab_indicator_selected"
+        android:state_selected="true"/>
+
+    <item android:drawable="@drawable/tab_indicator_default"/>
+</selector>