Pass dumpsys priority to IServiceManager

Modify IServiceManger to accept supported dumpsys priority as a bitmask
with NORMAL being the default priority. Change listServices to return
a list of services filtered by the priority or all services when the
priority is set to ALL.

BUG:27429130

Test: mmm -j32 frameworks/native/cmds/dumpsys && \
      adb sync data && adb shell /data/nativetest/dumpsys_test/dumpsys_test && \
      adb shell /data/nativetest64/dumpsys_test/dumpsys_test && \
      printf "\n\n#### ALL TESTS PASSED ####\n"

Change-Id: Ibccba63035ace9970c2967a621ee2ad8d15cbeea
diff --git a/cmds/dumpsys/dumpsys.cpp b/cmds/dumpsys/dumpsys.cpp
index 3227749..8fe246b 100644
--- a/cmds/dumpsys/dumpsys.cpp
+++ b/cmds/dumpsys/dumpsys.cpp
@@ -53,13 +53,16 @@
 
 static void usage() {
     fprintf(stderr,
-        "usage: dumpsys\n"
+            "usage: dumpsys\n"
             "         To dump all services.\n"
             "or:\n"
-            "       dumpsys [-t TIMEOUT] [--help | -l | --skip SERVICES | SERVICE [ARGS]]\n"
+            "       dumpsys [-t TIMEOUT] [--priority LEVEL] [--help | -l | --skip SERVICES | "
+            "SERVICE [ARGS]]\n"
             "         --help: shows this help\n"
             "         -l: only list services, do not dump them\n"
             "         -t TIMEOUT: TIMEOUT to use in seconds instead of default 10 seconds\n"
+            "         --priority LEVEL: filter services based on specified priority\n"
+            "               LEVEL must be one of CRITICAL | HIGH | NORMAL\n"
             "         --skip SERVICES: dumps all services but SERVICES (comma-separated list)\n"
             "         SERVICE [ARGS]: dumps only service SERVICE, optionally passing ARGS to it\n");
 }
@@ -80,11 +83,11 @@
     bool showListOnly = false;
     bool skipServices = false;
     int timeoutArg = 10;
-    static struct option longOptions[] = {
-        {"skip", no_argument, 0,  0 },
-        {"help", no_argument, 0,  0 },
-        {     0,           0, 0,  0 }
-    };
+    int dumpPriority = IServiceManager::DUMP_PRIORITY_ALL;
+    static struct option longOptions[] = {{"priority", required_argument, 0, 0},
+                                          {"skip", no_argument, 0, 0},
+                                          {"help", no_argument, 0, 0},
+                                          {0, 0, 0, 0}};
 
     // Must reset optind, otherwise subsequent calls will fail (wouldn't happen on main.cpp, but
     // happens on test cases).
@@ -106,6 +109,18 @@
             } else if (!strcmp(longOptions[optionIndex].name, "help")) {
                 usage();
                 return 0;
+            } else if (!strcmp(longOptions[optionIndex].name, "priority")) {
+                if (!strcmp(optarg, "CRITICAL")) {
+                    dumpPriority = IServiceManager::DUMP_PRIORITY_CRITICAL;
+                } else if (!strcmp(optarg, "HIGH")) {
+                    dumpPriority = IServiceManager::DUMP_PRIORITY_HIGH;
+                } else if (!strcmp(optarg, "NORMAL")) {
+                    dumpPriority = IServiceManager::DUMP_PRIORITY_NORMAL;
+                } else {
+                    fprintf(stderr, "\n");
+                    usage();
+                    return -1;
+                }
             }
             break;
 
@@ -151,7 +166,7 @@
 
     if (services.empty() || showListOnly) {
         // gets all services
-        services = sm_->listServices();
+        services = sm_->listServices(dumpPriority);
         services.sort(sort_func);
         args.add(String16("-a"));
     }