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/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 4b00ee4..a974d09 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -2310,6 +2310,7 @@
         T& mapper = mDevice->addMapper<T>(EVENTHUB_ID, args...);
         configureDevice(0);
         mDevice->reset(ARBITRARY_TIME);
+        mapper.reset(ARBITRARY_TIME);
         return mapper;
     }