Remove CAP_NET_RAW from adb

ping no longer needs CAP_NET_RAW. See:

* http://lwn.net/Articles/443051/
* https://android-review.googlesource.com/52090
* https://android-review.googlesource.com/52072

Eliminate the CAP_NET_RAW special case in adb

Change-Id: If9d32c5254291b123b06bededc94b64113f6b8f2
diff --git a/adb/adb.c b/adb/adb.c
index 530a4c8..a11e024 100644
--- a/adb/adb.c
+++ b/adb/adb.c
@@ -1195,8 +1195,7 @@
 #endif
     int i;
     for (i = 0; prctl(PR_CAPBSET_READ, i, 0, 0, 0) >= 0; i++) {
-        if ((i == CAP_NET_RAW) || (i == CAP_SETUID) || (i == CAP_SETGID)) {
-            // CAP_NET_RAW needed by /system/bin/ping
+        if ((i == CAP_SETUID) || (i == CAP_SETGID)) {
             // CAP_SETUID CAP_SETGID needed by /system/bin/run-as
             continue;
         }