Revert "Replace illustration for mailbox success"

This reverts commit 65509137

briar-android/artwork/ic_check_circle_dark.svg

-<svg width="91" height="90" viewBox="0 0 91 90" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M62.5714 35.1634C63.214 34.5173 63.2111 33.4726 62.5649 32.83C61.9188 32.1874 60.8741 32.1903 60.2315 32.8365L39.5238 53.66L30.5714 44.6578C29.9288 44.0117 28.8841 44.0088 28.238 44.6514C27.5918 45.2939 27.5889 46.3387 28.2315 46.9848L39.5238 58.3399L62.5714 35.1634Z" fill="#A3E635"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M89.4014 45C89.4014 69.3005 69.7019 89 45.4014 89C21.1008 89 1.40137 69.3005 1.40137 45C1.40137 20.6995 21.1008 1 45.4014 1C69.7019 1 89.4014 20.6995 89.4014 45ZM86.1014 45C86.1014 67.478 67.8794 85.7 45.4014 85.7C22.9234 85.7 4.70137 67.478 4.70137 45C4.70137 22.522 22.9234 4.3 45.4014 4.3C67.8794 4.3 86.1014 22.522 86.1014 45Z" fill="#A3E635"/>
-</svg>

briar-android/artwork/ic_check_circle_light.svg

-<svg width="91" height="90" viewBox="0 0 91 90" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M62.5714 35.1634C63.214 34.5173 63.2111 33.4726 62.5649 32.83C61.9188 32.1874 60.8741 32.1903 60.2315 32.8365L39.5238 53.66L30.5714 44.6578C29.9288 44.0117 28.8841 44.0088 28.238 44.6514C27.5918 45.2939 27.5889 46.3387 28.2315 46.9848L39.5238 58.3399L62.5714 35.1634Z" fill="#65A30D"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M89.4014 45C89.4014 69.3005 69.7019 89 45.4014 89C21.1008 89 1.40137 69.3005 1.40137 45C1.40137 20.6995 21.1008 1 45.4014 1C69.7019 1 89.4014 20.6995 89.4014 45ZM86.1014 45C86.1014 67.478 67.8794 85.7 45.4014 85.7C22.9234 85.7 4.70137 67.478 4.70137 45C4.70137 22.522 22.9234 4.3 45.4014 4.3C67.8794 4.3 86.1014 22.522 86.1014 45Z" fill="#65A30D"/>
-</svg>

briar-android/src/main/java/org/briarproject/briar/android/mailbox/MailboxActivity.java

@@ -186,7 +186,8 @@ public class MailboxActivity extends BriarActivity {
 			tag = ErrorFragment.TAG;
 		} else if (s instanceof MailboxPairingState.Paired) {
 			f = FinalFragment.newInstance(R.string.mailbox_setup_paired_title,
-					R.drawable.ic_check_circle, 0,
+					R.drawable.ic_check_circle_outline,
+					R.color.briar_brand_green,
 					R.string.mailbox_setup_paired_description);
 			tag = FinalFragment.TAG;
 		} else {

briar-android/src/main/res/drawable/ic_check_circle.xml

-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-	android:width="90dp"
-	android:height="90dp"
-	android:viewportWidth="91"
-	android:viewportHeight="90">
-	<path
-		android:fillColor="@color/il_lime"
-		android:pathData="M62.571,35.163C63.214,34.517 63.211,33.473 62.565,32.83C61.919,32.187 60.874,32.19 60.231,32.836L39.524,53.66L30.571,44.658C29.929,44.012 28.884,44.009 28.238,44.651C27.592,45.294 27.589,46.339 28.232,46.985L39.524,58.34L62.571,35.163Z" />
-	<path
-		android:fillColor="@color/il_lime"
-		android:fillType="evenOdd"
-		android:pathData="M89.401,45C89.401,69.3 69.702,89 45.401,89C21.101,89 1.401,69.3 1.401,45C1.401,20.699 21.101,1 45.401,1C69.702,1 89.401,20.699 89.401,45ZM86.101,45C86.101,67.478 67.879,85.7 45.401,85.7C22.923,85.7 4.701,67.478 4.701,45C4.701,22.522 22.923,4.3 45.401,4.3C67.879,4.3 86.101,22.522 86.101,45Z" />
-</vector>