[Chromecast] Set opt-in status on Android Things.

-the internal part is eureka-internal/221797

BUG=internal b/120030063

Test=Check the logging when switching from opt-in to opt-out.

Change-Id: Ib42484624007cf28c1a98ffc62851ea7f7656194
Reviewed-on: https://chromium-review.googlesource.com/c/1351283
Commit-Queue: Ziyang Cheng <ziyangch@chromium.org>
Reviewed-by: Simeon Anfinrud <sanfin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611453}

chromecast/base/chromecast_config_android.h

@@ -18,8 +18,15 @@ class ChromecastConfigAndroid {
 
   // Returns whether or not the user has allowed sending usage stats and
   // crash reports.
+  // TODO(ziyangch): Remove CanSendUsageStats() and switch to pure callback
+  // style.
   virtual bool CanSendUsageStats() = 0;
 
+  // Set the the user's sending usage stats.
+  // TODO(ziyangch): Remove SetSendUsageStats() after switching to Crashpad on
+  // Android.(The CL which does this is at https://crrev.com/c/989401.)
+  virtual void SetSendUsageStats(bool enabled) = 0;
+
   // Registers a handler to be notified when SendUsageStats is changed.
   virtual void SetSendUsageStatsChangedCallback(
       base::RepeatingCallback<void(bool)> callback) = 0;

chromecast/base/chromecast_config_android_dummy.cc

@@ -16,6 +16,8 @@ class ChromecastConfigAndroidDummy : public ChromecastConfigAndroid {
 
   bool CanSendUsageStats() override { return false; }
 
+  void SetSendUsageStats(bool enabled) override {}
+
   void SetSendUsageStatsChangedCallback(
       base::RepeatingCallback<void(bool)> callback) override {}