SF - plumbing game mode for metrics (Part 1)

This change adds a game mode in the Layer metadata that gets updated every
time a game app comes to the foreground. The gameMode is then set on the
Layer based on the metadata and reparenting.

The game mode will then be
updated in TimeStats as a dimension (Part 2, in a separate CL later).

Bug: 186025682
Test: libsurfaceflinger_unittest:GameModeTest

Change-Id: I09deffc01d1b318cc08d0475611289dec055c190

1 files changed, 2 insertions, 0 deletions

diff --git a/libs/gui/LayerMetadata.cpp b/libs/gui/LayerMetadata.cpp
index 634d8b7df0..189d51a4c1 100644
--- a/libs/gui/LayerMetadata.cpp
+++ b/libs/gui/LayerMetadata.cpp
@@ -136,6 +136,8 @@ std::string LayerMetadata::itemToString(uint32_t key, const char* separator) con
             return StringPrintf("ownerPID%s%d", separator, getInt32(key, 0));
         case view::LayerMetadataKey::METADATA_DEQUEUE_TIME:
             return StringPrintf("dequeueTime%s%" PRId64, separator, *getInt64(key));
+        case view::LayerMetadataKey::METADATA_GAME_MODE:
+            return StringPrintf("gameMode%s%d", separator, getInt32(key, 0));
         default:
             return StringPrintf("%d%s%dbytes", key, separator,
                                 static_cast<int>(mMap.at(key).size()));