Add orientation configuration for touchscreen devices

There are many instances where devices have display panels installed in
a different orientation than the device's default orientation. In these
cases, there is an SF flag to change the device's default orientation,
using ro.surface_flinger.primary_display_orientation. However, when that
is used, the touchscreens don't work in the expected orientation.

This CL adds the ability to configure the orientation of a touchscreen
device using an Input Device Configuration (IDC) file.

Bug: 196357204
Test: atest inputflinger_tests
Test: manual: ensure touch works as expected with
ro.sf.primary_display_orientation and touch.orientation set to 90

Change-Id: I1267f2b3fdb6faaef2923789bcaf5a6141971431
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.h b/services/inputflinger/reader/mapper/TouchInputMapper.h
index 920f842..e104220 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.h
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.h
@@ -204,6 +204,15 @@
         bool hasAssociatedDisplay;
         bool associatedDisplayIsExternal;
         bool orientationAware;
+
+        enum class Orientation : int32_t {
+            ORIENTATION_0 = DISPLAY_ORIENTATION_0,
+            ORIENTATION_90 = DISPLAY_ORIENTATION_90,
+            ORIENTATION_180 = DISPLAY_ORIENTATION_180,
+            ORIENTATION_270 = DISPLAY_ORIENTATION_270,
+        };
+        Orientation orientation;
+
         bool hasButtonUnderPad;
         std::string uniqueDisplayId;