arc: Implement smaller dumpstate output

Adds a -L commandline option to indicate a much smaller set of
dumpstate output safe for feedback reports.

Implements output of system logcat, event logs, networking, and dropbox
system server crash/system app crashes only.

Bug: 142684959
Bug: 136273873
Test: atest dumpstate_test
Change-Id: I1d564b949d0a44ff9cc014302d79703294a13d78
diff --git a/cmds/dumpstate/main.cpp b/cmds/dumpstate/main.cpp
index 68d3733..ec89c0d 100644
--- a/cmds/dumpstate/main.cpp
+++ b/cmds/dumpstate/main.cpp
@@ -30,7 +30,7 @@
     bool do_wait = false;
     int c;
     // Keep flags in sync with Dumpstate::DumpOptions::Initialize.
-    while ((c = getopt(argc, argv, "wdho:svqzpPBRSV:")) != -1 && !do_wait) {
+    while ((c = getopt(argc, argv, "dho:svqzpLPBRSV:w")) != -1 && !do_wait) {
         switch (c) {
             case 'w':
                 do_wait = true;