recovery: Fix the broken UI text.

UI text is broken (doesn't show any text during FDR) due to commit
d530449e54bd327e9c26209ffa0490c6508afe6c, which reordered the calls to
RecoveryUI::SetLocale() and RecoveryUI::Init().

Because Init() uses the locale info to load the localized texts (from
images), the locale must be set prior to that via SetLocale(). This CL
refactors Init() to take the locale parameter, and removes the odd
SetLocale() API.

Bug: 34029338
Test: 'Run graphics test' under recovery.
Change-Id: I620394a3d4e3705e9af5a1f6299285d143ae1b01
diff --git a/wear_ui.h b/wear_ui.h
index 5ac6f49..4cd852f 100644
--- a/wear_ui.h
+++ b/wear_ui.h
@@ -19,11 +19,13 @@
 #include "screen_ui.h"
+#include <string>
 class WearRecoveryUI : public ScreenRecoveryUI {
-    bool Init() override;
+    bool Init(const std::string& locale) override;
     void SetStage(int current, int max) override;