Support Singapore specific supervisory tone

Singapore use CEPT standard supervisory tones except
for busy and ringtone. The Singapore mapping will be
used if gsm.operator.iso-country == "sg".

Bug: 63120560
Test: Build and test ring back tone for Singapore
Change-Id: I86076b0799a741ad8c54968799e400622d223ccd
diff --git a/media/libaudioclient/ToneGenerator.cpp b/media/libaudioclient/ToneGenerator.cpp
index ea856af..435cfa2 100644
--- a/media/libaudioclient/ToneGenerator.cpp
+++ b/media/libaudioclient/ToneGenerator.cpp
@@ -787,6 +787,18 @@
                         { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
           .repeatCnt = ToneGenerator::TONEGEN_INF,
           .repeatSegment = 0 },                              // TONE_AUSTRALIA_CONGESTION
+        { .segments = { { .duration = 750, .waveFreq = { 425, 0 }, 0, 0 },
+                        { .duration = 750, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
+          .repeatCnt = ToneGenerator::TONEGEN_INF,
+          .repeatSegment = 0 },                              // TONE_SG_BUSY
+        { .segments = { { .duration = 400, .waveFreq = { 401, 425, 449, 0 }, 0, 0 },
+                        { .duration = 200, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 400, .waveFreq = { 401, 425, 449, 0 }, 0, 0 },
+                        { .duration = 2000, .waveFreq = { 0 }, 0, 0 },
+                        { .duration = 0 , .waveFreq = { 0 }, 0, 0}},
+          .repeatCnt = ToneGenerator::TONEGEN_INF,
+          .repeatSegment = 0 },                              // TONE_SG_RINGTONE
 };
 
 // Used by ToneGenerator::getToneForRegion() to convert user specified supervisory tone type
@@ -831,6 +843,16 @@
             TONE_SUP_ERROR,             // TONE_SUP_ERROR
             TONE_AUSTRALIA_CALL_WAITING,// TONE_SUP_CALL_WAITING
             TONE_AUSTRALIA_RINGTONE     // TONE_SUP_RINGTONE
+        },
+        {   // SINGAPORE
+            TONE_SUP_DIAL,               // TONE_SUP_DIAL
+            TONE_SG_BUSY,                // TONE_SUP_BUSY
+            TONE_SUP_CONGESTION,         // TONE_SUP_CONGESTION
+            TONE_SUP_RADIO_ACK,          // TONE_SUP_RADIO_ACK
+            TONE_SUP_RADIO_NOTAVAIL,     // TONE_SUP_RADIO_NOTAVAIL
+            TONE_SUP_ERROR,              // TONE_SUP_ERROR
+            TONE_SUP_CALL_WAITING,       // TONE_SUP_CALL_WAITING
+            TONE_SG_RINGTONE             // TONE_SUP_RINGTONE
         }
 };
 
@@ -889,6 +911,8 @@
         mRegion = GB;
     } else if (strstr(value, "au") != NULL) {
         mRegion = AUSTRALIA;
+    } else if (strstr(value, "sg") != NULL) {
+        mRegion = SINGAPORE;
     } else {
         mRegion = CEPT;
     }