otter: overlay: Update pixel pitch

Bug: 319894241
Flag: ACONFIG com.android.systemui.device_entry_udfps_refactor DEVELOPMENT
Test: manual

Change-Id: Iaa9576cb95ebe73043b7030b2b176f67bc90e3a1
diff --git a/overlay/SystemUIResTarget/res/values/dimens.xml b/overlay/SystemUIResTarget/res/values/dimens.xml
index 713d68f..64187ee 100644
--- a/overlay/SystemUIResTarget/res/values/dimens.xml
+++ b/overlay/SystemUIResTarget/res/values/dimens.xml
@@ -4,6 +4,10 @@
      SPDX-License-Identifier: Apache-2.0
 -->
 <resources>
+    <!-- Microns/ums (1000 um = 1mm) per pixel for the given device. If unspecified, UI that
+         relies on this value will not be sized correctly. -->
+    <item name="pixel_pitch" format="float" type="dimen">64.37</item>
+
     <!-- Height of the status bar header bar when on Keyguard -->
     <dimen name="status_bar_header_height_keyguard">@*android:dimen/status_bar_height</dimen>