Dumping stack traces to proto.

Bug: 72177715
Test: flash device and check incident.proto output
Change-Id: Id2a15e0fc62b66efe875949af97f0eb651c7e322
(cherry picked from commit 5c804e2b9893c7892900148229cf19fa6268e7dc)
diff --git a/tools/incident_section_gen/main.cpp b/tools/incident_section_gen/main.cpp
index e396a63..8219150 100644
--- a/tools/incident_section_gen/main.cpp
+++ b/tools/incident_section_gen/main.cpp
@@ -427,6 +427,8 @@
                 printf("    new GZipSection(%d,", field->number());
                 splitAndPrint(s.args());
                 printf(" NULL),\n");
+            case SECTION_TOMBSTONE:
+                printf("    new TombstoneSection(%d, \"%s\"),\n", field->number(), s.args().c_str());
                 break;
         }
     }