Fixed crash when opening DevicesFragment (fixes #690).

It seems that the xxxhdpi `active` drawable was corrupted. The old
build tools could still read the drawable, but the new ones
couldn't handle it. Regenerating the drawable fixed the crash.

Also removed `inactive` drawables and xml drawable which weren't
being used.

src/main/res/drawable/ic_tag_text_outline_black_24dp.xml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:drawable="@drawable/ic_tag_text_outline_black_24dp_inactive" android:state_enabled="false" />
-    <item android:drawable="@drawable/ic_tag_text_outline_black_24dp_active" />
-</selector>

src/main/res/layout/fragment_device.xml

@@ -51,8 +51,8 @@
             style="@style/Widget.Syncthing.TextView.Label.Details.Field"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:drawableLeft="@drawable/ic_tag_text_outline_black_24dp"
+            android:drawableLeft="@drawable/ic_tag_text_outline_black_24dp_active"
-            android:drawableStart="@drawable/ic_tag_text_outline_black_24dp"
+            android:drawableStart="@drawable/ic_tag_text_outline_black_24dp_active"
             android:hint="@string/name"
             android:imeOptions="actionNext"
             android:inputType="textCapWords" />