Optimize memory usage of InputEvent lookup.

Move the declaration of look up map to cpp file from header file to
avoid duplicate copies.

Bug: 165527068
Bug: 165398580
Bug: 165035349

Test: atest libinput_tests, atest inputflinger_tests
adb shell showmap <system_server pid> | grep input
Check libinput.so and libinput_reader.so size to be 300 and 372KB.

Change-Id: Ia80200b7889f16ce576637d746e64641f3f2a094
diff --git a/services/inputflinger/reader/InputDevice.cpp b/services/inputflinger/reader/InputDevice.cpp
index 14f922f..c63c179 100644
--- a/services/inputflinger/reader/InputDevice.cpp
+++ b/services/inputflinger/reader/InputDevice.cpp
@@ -108,7 +108,7 @@
         dump += INDENT2 "Motion Ranges:\n";
         for (size_t i = 0; i < ranges.size(); i++) {
             const InputDeviceInfo::MotionRange& range = ranges[i];
-            const char* label = getAxisLabel(range.axis);
+            const char* label = InputEventLookup::getAxisLabel(range.axis);
             char name[32];
             if (label) {
                 strncpy(name, label, sizeof(name));
diff --git a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
index 57acba5..abd8aa9 100644
--- a/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
+++ b/services/inputflinger/reader/mapper/JoystickInputMapper.cpp
@@ -73,14 +73,14 @@
 
     dump += INDENT3 "Axes:\n";
     for (const auto& [rawAxis, axis] : mAxes) {
-        const char* label = getAxisLabel(axis.axisInfo.axis);
+        const char* label = InputEventLookup::getAxisLabel(axis.axisInfo.axis);
         if (label) {
             dump += StringPrintf(INDENT4 "%s", label);
         } else {
             dump += StringPrintf(INDENT4 "%d", axis.axisInfo.axis);
         }
         if (axis.axisInfo.mode == AxisInfo::MODE_SPLIT) {
-            label = getAxisLabel(axis.axisInfo.highAxis);
+            label = InputEventLookup::getAxisLabel(axis.axisInfo.highAxis);
             if (label) {
                 dump += StringPrintf(" / %s (split at %d)", label, axis.axisInfo.splitValue);
             } else {