Introduce Dialog Theme for Onboarding

briar-android/src/main/java/org/briarproject/briar/android/privategroup/reveal/RevealContactsActivity.java

@@ -112,9 +112,9 @@ public class RevealContactsActivity extends ContactSelectorActivity
 	}
 
 	private void showOnboardingDialog() {
-		new AlertDialog.Builder(this, R.style.BriarDialogTheme)
+		new AlertDialog.Builder(this, R.style.OnboardingDialogTheme)
 				.setMessage(getString(R.string.groups_reveal_dialog_message))
-				.setNeutralButton(R.string.ok,
+				.setNeutralButton(R.string.got_it,
 						new DialogInterface.OnClickListener() {
 							@Override
 							public void onClick(DialogInterface dialog,

briar-android/src/main/res/values/strings.xml

@@ -71,6 +71,7 @@
 	<string name="hide">Hide</string>
 	<string name="ok">OK</string>
 	<string name="cancel">Cancel</string>
+	<string name="got_it">Got it</string>
 	<string name="delete">Delete</string>
 	<string name="accept">Accept</string>
 	<string name="decline">Decline</string>

briar-android/src/main/res/values/themes.xml

@@ -58,6 +58,13 @@
 		<item name="android:windowExitAnimation">@android:anim/fade_out</item>
 	</style>
 
+	<style name="OnboardingDialogTheme" parent="BriarDialogTheme">
+		<item name="android:background">@color/briar_primary</item>
+		<item name="android:textColorPrimary">@color/briar_text_primary_inverse</item>
+		<item name="android:textColorSecondary">@color/briar_text_secondary_inverse</item>
+		<item name="buttonBarNeutralButtonStyle">@style/Widget.AppCompat.Button.Borderless</item>
+	</style>
+
 	<!-- This fixes a UI bug in the support preference library -->
 	<style name="BriarTheme.ListSeparatorTextView">
 		<item name="android:textSize">14sp</item>
@@ -67,5 +74,4 @@
 		<item name="android:layout_marginBottom">16dp</item>
 	</style>
 
-
 </resources>
\ No newline at end of file