Merge SwitchStatementWithSingleDefaultInspection into SwitchStatementWithTooFewBranches

Fixes IDEA-199499 Improve "Replace 'switch' with 'if'" action and make it a quick-fix for "Switch has too few branches"
Now default is not counted as branch in SwitchStatementWithTooFewBranches

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/switchDefault/afterBreakInIf.java

@@ -1,7 +1,7 @@
 // "Unwrap 'switch' statement" "true"
 class X {
   String test(char c) {
-      if(c == 'a') {
+      if (c == 'a') {
           System.out.println("foo");
       } else {
       }