Fix broken input tests

InputPublisherAndConsumer_test currently segfaults due to
null pointer dereference. This is because 0 is passed instead
of a valid pointer to an allocated int32_t. Also, enforce strict
compiler warnings, include signed comparisons.

Bug: 62033391
Test: m -j libinput_tests_InputEvent_test
libinput_tests_InputChannel_test
libinput_tests_InputPublisherAndConsumer_test
libinput_tests_InputTransport_test libinput_tests_VelocityTracker_test
&& adb push out/target/product/taimen/data/nativetest/libinput_tests/
/data/nativetest/
then run the above tests individually, for example
/data/nativetest/libinput_tests # ./InputPublisherAndConsumer_test
and others in a similar manner

Change-Id: Ia030cdbfa22d2bf7bdf6274a337b059ca3f9a6c3
diff --git a/libs/input/tests/InputEvent_test.cpp b/libs/input/tests/InputEvent_test.cpp
index 3fb1c6d..fd3b7c8 100644
--- a/libs/input/tests/InputEvent_test.cpp
+++ b/libs/input/tests/InputEvent_test.cpp
@@ -184,7 +184,7 @@
 
     ASSERT_EQ(AINPUT_EVENT_TYPE_KEY, event.getType());
     ASSERT_EQ(2, event.getDeviceId());
-    ASSERT_EQ(AINPUT_SOURCE_GAMEPAD, event.getSource());
+    ASSERT_EQ(static_cast<int>(AINPUT_SOURCE_GAMEPAD), event.getSource());
     ASSERT_EQ(AKEY_EVENT_ACTION_DOWN, event.getAction());
     ASSERT_EQ(AKEY_EVENT_FLAG_FROM_SYSTEM, event.getFlags());
     ASSERT_EQ(AKEYCODE_BUTTON_X, event.getKeyCode());
@@ -196,7 +196,7 @@
 
     // Set source.
     event.setSource(AINPUT_SOURCE_JOYSTICK);
-    ASSERT_EQ(AINPUT_SOURCE_JOYSTICK, event.getSource());
+    ASSERT_EQ(static_cast<int>(AINPUT_SOURCE_JOYSTICK), event.getSource());
 }
 
 
@@ -300,7 +300,7 @@
     // Check properties.
     ASSERT_EQ(AINPUT_EVENT_TYPE_MOTION, event->getType());
     ASSERT_EQ(2, event->getDeviceId());
-    ASSERT_EQ(AINPUT_SOURCE_TOUCHSCREEN, event->getSource());
+    ASSERT_EQ(static_cast<int>(AINPUT_SOURCE_TOUCHSCREEN), event->getSource());
     ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, event->getAction());
     ASSERT_EQ(AMOTION_EVENT_FLAG_WINDOW_IS_OBSCURED, event->getFlags());
     ASSERT_EQ(AMOTION_EVENT_EDGE_FLAG_TOP, event->getEdgeFlags());
@@ -432,7 +432,7 @@
 
     // Set source.
     event.setSource(AINPUT_SOURCE_JOYSTICK);
-    ASSERT_EQ(AINPUT_SOURCE_JOYSTICK, event.getSource());
+    ASSERT_EQ(static_cast<int>(AINPUT_SOURCE_JOYSTICK), event.getSource());
 
     // Set action.
     event.setAction(AMOTION_EVENT_ACTION_CANCEL);