tombstoned: fix file creation for ANRs.

Bug: http://b/188315622
Test: manual
Change-Id: I2948b929beb3093b59c8d37b706c857e7422a3cc
Merged-In: I2948b929beb3093b59c8d37b706c857e7422a3cc
(cherry picked from commit 931274862fc55bc723ee72c0c989984c4ffb7776)

debuggerd/tombstoned/tombstoned.cpp

@@ -165,8 +165,7 @@ class CrashQueue {
 
     switch (dump_type) {
       case kDebuggerdNativeBacktrace:
-      case kDebuggerdJavaBacktrace:
-        // Don't generate tombstones for backtrace requests.
+        // Don't generate tombstones for native backtrace requests.
         return {};
 
       case kDebuggerdTombstoneProto:
@@ -178,6 +177,7 @@ class CrashQueue {
         result.text = create_temporary_file();
         break;
 
+      case kDebuggerdJavaBacktrace:
       case kDebuggerdTombstone:
         result.text = create_temporary_file();
         break;