TouchInputMapper: Initialize mSurfaceRight and mSurfaceBottom.

Initialize mSurfaceRight and mSurfaceBottom in class TouchInputMapper
constructor. Reset TouchInputMapper in unit test.

Bug: 162974380
Test: atest MultiTouchInputMapperTest#Process_TouchpadCapture
Change-Id: I5e119c3f79a3bb318746038a1adcf79c0da95724
diff --git a/services/inputflinger/reader/mapper/TouchInputMapper.cpp b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
index 86229f9..e867c6f 100644
--- a/services/inputflinger/reader/mapper/TouchInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/TouchInputMapper.cpp
@@ -170,6 +170,8 @@
         mRawSurfaceHeight(-1),
         mSurfaceLeft(0),
         mSurfaceTop(0),
+        mSurfaceRight(0),
+        mSurfaceBottom(0),
         mPhysicalWidth(-1),
         mPhysicalHeight(-1),
         mPhysicalLeft(0),