[Chromecast] Add REGENERATE_CLOUD_ID as a reboot reason.

Also abstract out the GN target referencing the internal Android
implementation of RebootShlib.

Merge-With: eureka-internal/276643

Bug: 123253176
Test: Instructions on internal patch
Change-Id: I188fc39bc8a5ea862b4cc9c56b6163114dc17e9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1643827
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Simeon Anfinrud <sanfin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#667672}

chromecast/public/reboot_shlib.h

@@ -68,6 +68,10 @@ class CHROMECAST_EXPORT RebootShlib {
 
     // A reboot caused by overheat.
     OVERHEAT = 11,
+
+    // The device got into a state such that it needs to regenerate the cloud
+    // device id.
+    REGENERATE_CLOUD_ID = 12,
   };
 
   // Initializes any platform-specific reboot systems.

chromecast/system/reboot/BUILD.gn

@@ -21,14 +21,11 @@ cast_source_set("reboot_util") {
     sources += [ "reboot_util_dummy.cc" ]
   }
 
-  if (is_android_things && chromecast_branding != "public") {
+  if (is_android && chromecast_branding != "public") {
     deps += [
-      "//chromecast/internal/system/reboot/android:reboot_android_things",
+      "//chromecast/internal/system/reboot/android:reboot_shlib_impl",
       "//chromecast/public",
     ]
-  } else if (is_android) {
-    sources += [ "reboot_dummy.cc" ]
-    deps += [ "//chromecast/public" ]
   } else {
     deps += [ ":libcast_reboot_1.0" ]
   }

chromecast/system/reboot/reboot_util_core.cc

@@ -40,6 +40,7 @@ bool RebootUtil::IsValidRebootSource(RebootShlib::RebootSource reboot_source) {
     case RebootShlib::RebootSource::HW_WATCHDOG:
     case RebootShlib::RebootSource::SW_OTHER:
     case RebootShlib::RebootSource::OVERHEAT:
+    case RebootShlib::RebootSource::REGENERATE_CLOUD_ID:
       return true;
     default:
       return false;