Bug 1390022 - Add Galaxy S4 SPH-L720 model into blacklist for disabling adaptive playback feature. r=jolin

MozReview-Commit-ID: 1UOT759az4S

--HG--
extra : rebase_source : ce0fdaab5f8d8d8b73dbc998422aac319c63eff5

mobile/android/geckoview/src/main/java/org/mozilla/gecko/util/HardwareCodecCapabilityUtils.java

@@ -47,6 +47,7 @@ public final class HardwareCodecCapabilityUtils {
     "GT-I9505",         // S4
     "GT-I9515",         // S4
     "SGH-I337",         // S4
+    "SPH-L720",         // S4 (Sprint)
     "SAMSUNG-SGH-I337", // S4
     "LG-D605"           // LG Optimus L9 II
   };