OMS: add 'cmd overlay lookup' command

Add a shell command to look up the value of any resource. This allows a
developer to quickly see what the value of a resource is, using the
current device configuration and the currently enabled overlays. For
more fine-grained control, use 'idmap2 lookup' instead.

Example:

  $ adb shell cmd overlay lookup --verbose android android:bool/config_annoy_dianne
  Resolution for 0x01110020 android:bool/config_annoy_dianne
          For config -en-rUS-ldltr-sw320dp-w320dp-h461dp-normal-notlong-notround-nowidecg-lowdr-port-uiModeType=2-notnight-hdpi-finger-keysexposed-qwerty-trackball-728x480-v29
          Found initial: android
  true

  $ adb shell cmd overlay enable test.overlay

  $ adb shell cmd overlay lookup --verbose android android:bool/config_annoy_dianne
  Resolution for 0x01110020 test.overlay:bool/config_annoy_dianne
          For config -en-rUS-ldltr-sw320dp-w320dp-h461dp-normal-notlong-notround-nowidecg-lowdr-port-uiModeType=2-notnight-hdpi-finger-keysexposed-qwerty-trackball-728x480-v29
          Found initial: android
          Overlaid: test.overlay
  false

Test: manual: adb shell cmd overlay lookup --verbose android android:array/preloaded_drawables
Change-Id: I00efe23b1a0f7342a5cf7f4ba86f3eae6714c9aa
diff --git a/services/core/java/com/android/server/om/OverlayManagerService.java b/services/core/java/com/android/server/om/OverlayManagerService.java
index 965ddc9..f8b3fb2 100644
--- a/services/core/java/com/android/server/om/OverlayManagerService.java
+++ b/services/core/java/com/android/server/om/OverlayManagerService.java
@@ -744,7 +744,7 @@
                 @NonNull final FileDescriptor out, @NonNull final FileDescriptor err,
                 @NonNull final String[] args, @NonNull final ShellCallback callback,
                 @NonNull final ResultReceiver resultReceiver) {
-            (new OverlayManagerShellCommand(this)).exec(
+            (new OverlayManagerShellCommand(getContext(), this)).exec(
                     this, in, out, err, args, callback, resultReceiver);
         }