Android: enable WebRTC HW H264 with a flag by default

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 486a2df49249c438e1e56e27dae6b4e8706ac3d9..9efc319498b1bb9f59120c8b465cfe7876bf13db 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -92153,7 +92153,7 @@ value.
   <int value="-2020024440" label="scroll-end-effect"/>
   <int value="-2017953534" label="enable-hosted-app-shim-creation"/>
   <int value="-2013551096" label="ViewsSimplifiedFullscreenUI:disabled"/>
-  <int value="-2008272679" label="disable-webrtc-hw-encoding"/>
+  <int value="-2009622663" label="WebRtcHWH264Encoding:enabled"/>
   <int value="-2005089558" label="BackgroundVideoTrackOptimization:disabled"/>
   <int value="-2003354337"
       label="enable-search-button-in-omnibox-for-str-or-iip"/>
@@ -92168,6 +92168,7 @@ value.
   <int value="-1963402827" label="enable-topchrome-md"/>
   <int value="-1961648833" label="show_summary"/>
   <int value="-1956349722" label="disable-smooth-scrolling"/>
+  <int value="-1948540128" label="disable-webrtc-hw-encoding (deprecated)"/>
   <int value="-1946595906" label="enable-push-api-background-mode"/>
   <int value="-1943507605" label="enable-new-video-renderer"/>
   <int value="-1941852572" label="floating-virtual-keyboard"/>
@@ -92206,6 +92207,7 @@ value.
   <int value="-1832575380" label="show-saved-copy"/>
   <int value="-1832221649" label="disable-out-of-process-pac"/>
   <int value="-1821058653" label="enable-delay-agnostic-aec"/>
+  <int value="-1811394154" label="disable-webrtc-hw-vp8-encoding"/>
   <int value="-1804485171" label="disable-fullscreen-tab-detaching"/>
   <int value="-1802502753" label="enable-manual-password-generation:enabled"/>
   <int value="-1798337879" label="enable-md-downloads"/>
@@ -92647,6 +92649,7 @@ value.
   <int value="365467768" label="prefetch-search-results"/>
   <int value="368854020" label="ash-screen-rotation-animation"/>
   <int value="370486304" label="enable-origin-chip-on-srp"/>
+  <int value="377093001" label="WebRtcHWH264Encoding:disabled"/>
   <int value="379326303" label="enable-add-to-shelf"/>
   <int value="379428799" label="security-chip-animation"/>
   <int value="385969127" label="disable-win32k-lockdown"/>