servicemanager: Allow '/' character in service names.

To work as instance name separater consistently w/ HIDL.

In HIDL, people are used to writing something like:
    android.hardware.light@2.0::ILight/default

In AIDL, the same thing would look like:
    android.hardware.light.ILight/default

Bug: 136027762
Test: use '/' in service name
Change-Id: Ie108029bd37b09647b761c5c5ce3a901dbfd4f19
diff --git a/cmds/servicemanager/ServiceManager.cpp b/cmds/servicemanager/ServiceManager.cpp
index f35f360..4d5c76a 100644
--- a/cmds/servicemanager/ServiceManager.cpp
+++ b/cmds/servicemanager/ServiceManager.cpp
@@ -67,7 +67,7 @@
     if (name.size() > 127) return false;
 
     for (char c : name) {
-        if (c == '_' || c == '-' || c == '.') continue;
+        if (c == '_' || c == '-' || c == '.' || c == '/') continue;
         if (c >= 'a' && c <= 'z') continue;
         if (c >= 'A' && c <= 'Z') continue;
         if (c >= '0' && c <= '9') continue;