Remove underscores from tests names

I5532e140a603be222cb3ea1ae563638317c1d745 introduced some tests with
underscores in their names, which GoogleTest discourages. Theses aren't
(currently) harmful, but update them to conform to recommendations.

Bug: 269685949
Bug: 259407931
Test: ActiveDisplayRotationFlagsTest
Change-Id: Ia5dd12f4b7fc32758ad4cb79f1e3118c98fd9340
diff --git a/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp b/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
index 7077523..f1bb231 100644
--- a/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/ActiveDisplayRotationFlagsTest.cpp
@@ -85,7 +85,7 @@
     ASSERT_EQ(ui::Transform::ROT_90, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotate90_inactive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotate90inactive) {
     auto displayToken = mOuterDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;
     mFlinger.mutableCurrentState().displays.editValueFor(displayToken).orientation =
@@ -95,7 +95,7 @@
     ASSERT_EQ(ui::Transform::ROT_0, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotateBoth_innerActive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotateBothInnerActive) {
     auto displayToken = mInnerDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;
     mFlinger.mutableCurrentState().displays.editValueFor(displayToken).orientation =
@@ -110,7 +110,7 @@
     ASSERT_EQ(ui::Transform::ROT_180, SurfaceFlinger::getActiveDisplayRotationFlags());
 }
 
-TEST_F(ActiveDisplayRotationFlagsTest, rotateBoth_outerActive) {
+TEST_F(ActiveDisplayRotationFlagsTest, rotateBothOuterActive) {
     mFlinger.mutableActiveDisplayId() = kOuterDisplayId;
     auto displayToken = mInnerDisplay->getDisplayToken().promote();
     mFlinger.mutableDrawingState().displays.editValueFor(displayToken).orientation = ui::ROTATION_0;