Add GPU draw stats to gfxinfo and GraphicsStatsService

Test: ran dumpsys with gfxinfo and graphicsstats
Change-Id: Id9950de87dc4343c6878baa6a6dd42fbc8aeddef
diff --git a/libs/hwui/ProfileData.h b/libs/hwui/ProfileData.h
index 564920b..ccbffc6 100644
--- a/libs/hwui/ProfileData.h
+++ b/libs/hwui/ProfileData.h
@@ -54,8 +54,10 @@
     void mergeWith(const ProfileData& other);
     void dump(int fd) const;
     uint32_t findPercentile(int percentile) const;
+    uint32_t findGPUPercentile(int percentile) const;
 
     void reportFrame(int64_t duration);
+    void reportGPUFrame(int64_t duration);
     void reportJank() { mJankFrameCount++; }
     void reportJankType(JankType type) { mJankTypeCounts[static_cast<int>(type)]++; }
 
@@ -69,15 +71,21 @@
         uint32_t frameCount;
     };
     void histogramForEach(const std::function<void(HistogramEntry)>& callback) const;
+    void histogramGPUForEach(const std::function<void(HistogramEntry)>& callback) const;
 
     constexpr static int HistogramSize() {
         return std::tuple_size<decltype(ProfileData::mFrameCounts)>::value +
                std::tuple_size<decltype(ProfileData::mSlowFrameCounts)>::value;
     }
 
+    constexpr static int GPUHistogramSize() {
+        return std::tuple_size<decltype(ProfileData::mGPUFrameCounts)>::value;
+    }
+
     // Visible for testing
     static uint32_t frameTimeForFrameCountIndex(uint32_t index);
     static uint32_t frameTimeForSlowFrameCountIndex(uint32_t index);
+    static uint32_t GPUFrameTimeForFrameCountIndex(uint32_t index);
 
 private:
     // Open our guts up to unit tests
@@ -88,6 +96,9 @@
     std::array<uint32_t, 57> mFrameCounts;
     // Holds a histogram of frame times in 50ms increments from 150ms to 5s
     std::array<uint16_t, 97> mSlowFrameCounts;
+    // Holds a histogram of GPU draw times in 1ms increments. Frames longer than 25ms are placed in
+    // last bucket.
+    std::array<uint32_t, 26> mGPUFrameCounts;
 
     uint32_t mTotalFrameCount;
     uint32_t mJankFrameCount;