Media/ToneGenerator: Change tone format for TONE_CDMA_ANSWER

Tone format for TONE_CDMA_ANSWER should be 660Hz + 1000Hz, with a 500ms ON
duration.
diff --git a/media/libmedia/ToneGenerator.cpp b/media/libmedia/ToneGenerator.cpp
index 60e3d71..82fe2d4 100644
--- a/media/libmedia/ToneGenerator.cpp
+++ b/media/libmedia/ToneGenerator.cpp
@@ -224,7 +224,8 @@
                       { duration: 0 , waveFreq: { 0 }, 0, 0}},
           repeatCnt: 2,
           repeatSegment: 0 },                              // TONE_CDMA_CONFIRM
-        { segments: { { duration: 0, waveFreq: { 0 }, 0, 0 }},
+        { segments: { { duration: 500, waveFreq: { 660, 1000, 0 }, 0, 0 },
+                      { duration: 0 , waveFreq: { 0 }, 0, 0}},
           repeatCnt: 0,
           repeatSegment: 0 },                              // TONE_CDMA_ANSWER
         { segments: { { duration: 300, waveFreq: { 440, 0 }, 0, 0 },