Rename UK tones to GB tones

Previous CL which introduced UK tones was incorrect since "uk" is not a
valid ISO country code. This change checks for the "gb" country code
instead.

Change-Id: I1f99a7ec5dd24a112b2b1b486fe613f965fba7ff
Fix: 31003209
diff --git a/media/libmedia/ToneGenerator.cpp b/media/libmedia/ToneGenerator.cpp
index 9a087ff..7a72237 100644
--- a/media/libmedia/ToneGenerator.cpp
+++ b/media/libmedia/ToneGenerator.cpp
@@ -746,7 +746,7 @@
                         { .duration = 2000, .waveFreq = { 0 }, 0, 0},
                         { .duration = 0, .waveFreq = { 0 }, 0, 0}},
           .repeatCnt = ToneGenerator::TONEGEN_INF,
-          .repeatSegment = 0 },                              // TONE_UK_RINGTONE
+          .repeatSegment = 0 },                              // TONE_GB_RINGTONE
         { .segments = { { .duration = 400, .waveFreq = { 400, 450, 0 }, 0, 0 },
                         { .duration = 200, .waveFreq = { 0 }, 0, 0 },
                         { .duration = 400, .waveFreq = { 400, 450, 0 }, 0, 0 },
@@ -796,7 +796,7 @@
             TONE_SUP_CALL_WAITING,       // TONE_SUP_CALL_WAITING
             TONE_SUP_RINGTONE            // TONE_SUP_RINGTONE
         },
-        {   // UK
+        {   // GB
             TONE_SUP_DIAL,               // TONE_SUP_DIAL
             TONE_SUP_BUSY,               // TONE_SUP_BUSY
             TONE_SUP_CONGESTION,         // TONE_SUP_CONGESTION
@@ -804,7 +804,7 @@
             TONE_SUP_RADIO_NOTAVAIL,     // TONE_SUP_RADIO_NOTAVAIL
             TONE_SUP_ERROR,              // TONE_SUP_ERROR
             TONE_SUP_CALL_WAITING,       // TONE_SUP_CALL_WAITING
-            TONE_UK_RINGTONE             // TONE_SUP_RINGTONE
+            TONE_GB_RINGTONE             // TONE_SUP_RINGTONE
         },
         {   // AUSTRALIA
             TONE_ANSI_DIAL,             // TONE_SUP_DIAL
@@ -869,8 +869,8 @@
         mRegion = ANSI;
     } else if (strstr(value, "jp") != NULL) {
         mRegion = JAPAN;
-    } else if (strstr(value, "uk") != NULL) {
-        mRegion = UK;
+    } else if (strstr(value, "gb") != NULL) {
+        mRegion = GB;
     } else if (strstr(value, "au") != NULL) {
         mRegion = AUSTRALIA;
     } else {