Copy BasicShellCommandHandler into Telephony

Make a copy at compile time since we need to use it as a mainline module

Bug: 146834818
Test: manual (adb shell cmd phone help)
Change-Id: I4a2f54a0e926aa7040ba91853ca05f4bf38d25ec

Android.bp

@@ -1075,6 +1075,7 @@ genrule {
 filegroup {
     name: "framework-telephony-stack-shared-srcs",
     srcs: [
+        "core/java/android/os/BasicShellCommandHandler.java",
         "core/java/android/os/RegistrantList.java",
         "core/java/android/os/Registrant.java",
         "core/java/android/util/LocalLog.java",