Add minKeyboardHeight attribute to Keyboard layout

Bug: 4411676
Change-Id: I1f56ba58bacb90790f82326718bf9de95dba5d28
diff --git a/java/res/values/attrs.xml b/java/res/values/attrs.xml
index e88b007..7f2a400 100644
--- a/java/res/values/attrs.xml
+++ b/java/res/values/attrs.xml
@@ -80,6 +80,9 @@
         <attr name="keyboardHeight" format="dimension" />
         <!-- Maximum keyboard height, in pixels or percentage of display height -->
         <attr name="maxKeyboardHeight" format="dimension|fraction" />
+        <!-- Minimum keyboard height represented in pixels, percentage of display height if fraction
+             is positive, or percentage of display width if fraction is negative. -->
+        <attr name="minKeyboardHeight" format="dimension|fraction" />
         <!-- Default width of a key, in pixels or percentage of display width. -->
         <attr name="keyWidth" format="dimension|fraction" />
         <!-- Default height of a row (key height + vertical gap), in pixels or percentage of