Report js exceptions via Lacrima

Summary:
Why Lacrima?
- Throw a JavascriptException in native won't get the js error reported to backend, we need to use reporter APIs
- Lacrima is a new error reporting framework to report crashes and app deaths in android applications at Facebook, and it has APIs for reporting js exceptions.
- ```FbErrorReporterImpl.java``` uses ```Acra``` API to report, and ```Lacrima``` is a rewrite of ```Acra``` https://fb.workplace.com/groups/323014308578038/
- We've been receiving js errors reported via Lacrima https://fburl.com/logview/y1vhc8u8

In this diff all js errors are treated as soft errors during reporting because they don't usually crash the app, crashes will be reported with a different category.

Changelog:
[Android][Chagned] - Change static string to public

Reviewed By: fkgozali

Differential Revision: D34095100

fbshipit-source-id: 73d89647134a197baf5d228d620732781b6bd723

ReactAndroid/src/main/java/com/facebook/react/util/JSStackTrace.java

@@ -15,12 +15,13 @@
 
 public class JSStackTrace {
 
-  private static final String LINE_NUMBER_KEY = "lineNumber";
+  public static final String LINE_NUMBER_KEY = "lineNumber";
+  public static final String FILE_KEY = "file";
+  public static final String COLUMN_KEY = "column";
+  public static final String METHOD_NAME_KEY = "methodName";
+
   private static final Pattern FILE_ID_PATTERN =
       Pattern.compile("\\b((?:seg-\\d+(?:_\\d+)?|\\d+)\\.js)");
-  private static final String FILE_KEY = "file";
-  private static final String COLUMN_KEY = "column";
-  private static final String METHOD_NAME_KEY = "methodName";
 
   public static String format(String message, ReadableArray stack) {
     StringBuilder stringBuilder = new StringBuilder(message).append(", stack:\n");