Deprecate getDisplayBrightnessSupport.

Brightness is already a per display capability, we don't need this API.

BUG: 130313275
Test: build
Change-Id: I0a669aca19a2873df41bee82bd0e5e2775af8101
diff --git a/current.txt b/current.txt
index 875be97..b6d9540 100644
--- a/current.txt
+++ b/current.txt
@@ -487,7 +487,7 @@
 01c6398c90fc6be0640810e2c5d8a4863b457280132bb3f97dd5682e19632b62 android.hardware.graphics.bufferqueue@2.0::types
 7a2d64095252f85781b2d521f4f11d04ce774544feececcec2088c568656e93c android.hardware.graphics.common@1.2::types
 3dff04a36b86660b5807414587e530bb0c294ed56fdff06f8915ba0a9b73f974 android.hardware.graphics.composer@2.3::IComposer
-54bc1dc874f8bc0781767786075dafd33a0796c1eea7d2317231b8929280e946 android.hardware.graphics.composer@2.3::IComposerClient
+b2b0ef3e6f5e9bb4aa6e978bc62e017b3fd64dba95a2152e8b07e3b7c4581d4f android.hardware.graphics.composer@2.3::IComposerClient
 033e096cb65e5093ee1d0e473892b9a487911d4611dbb65ebecb5cef18338923 android.hardware.graphics.mapper@3.0::IMapper
 7183d9d9acfa41a61a64bdfed548e98299265a7bb1821a3ed204173b5c2cfd4a android.hardware.graphics.mapper@3.0::types
 c3f831a66d5815baf74f5b82fe79cf099542ddae4dfab3f388e1d41828e794fc android.hardware.health.storage@1.0::IGarbageCollectCallback
diff --git a/graphics/composer/2.3/IComposerClient.hal b/graphics/composer/2.3/IComposerClient.hal
index 1eea306..4d6f78f 100644
--- a/graphics/composer/2.3/IComposerClient.hal
+++ b/graphics/composer/2.3/IComposerClient.hal
@@ -502,6 +502,10 @@
                        float minLuminance);
 
     /**
+     * Use getDisplayCapabilities instead. If brightness is supported, must return
+     * DisplayCapability::BRIGHTNESS as one of the display capabilities via getDisplayCapabilities.
+     * Only use getDisplayCapabilities as the source of truth to query brightness support.
+     *
      * Gets whether brightness operations are supported on a display.
      *
      * @param display
diff --git a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
index 56b2e33..d51c30a 100644
--- a/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
+++ b/graphics/composer/2.3/vts/functional/VtsHalGraphicsComposerV2_3TargetTest.cpp
@@ -572,6 +572,10 @@
             std::find(capabilities.begin(), capabilities.end(),
                       IComposerClient::DisplayCapability::DOZE) != capabilities.end();
     EXPECT_EQ(mComposerClient->getDozeSupport(mPrimaryDisplay), hasDozeSupport);
+    bool hasBrightnessSupport =
+            std::find(capabilities.begin(), capabilities.end(),
+                      IComposerClient::DisplayCapability::BRIGHTNESS) != capabilities.end();
+    EXPECT_EQ(mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay), hasBrightnessSupport);
 }
 
 TEST_F(GraphicsComposerHidlTest, getDisplayCapabilitiesBadDisplay) {
@@ -604,24 +608,18 @@
 }
 
 /*
- * Test that getDisplayBrightnessSupport works as expected.
+ * Test that if brightness operations are supported, setDisplayBrightness works as expected.
  */
-TEST_F(GraphicsComposerHidlTest, getDisplayBrightnessSupport) {
+TEST_F(GraphicsComposerHidlTest, setDisplayBrightness) {
     std::vector<IComposerClient::DisplayCapability> capabilities;
     const auto error = mComposerClient->getDisplayCapabilities(mPrimaryDisplay, &capabilities);
     ASSERT_EQ(Error::NONE, error);
     bool brightnessSupport =
             std::find(capabilities.begin(), capabilities.end(),
                       IComposerClient::DisplayCapability::BRIGHTNESS) != capabilities.end();
-    EXPECT_EQ(mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay), brightnessSupport);
-}
-
-/*
- * Test that if brightness operations are supported, setDisplayBrightness works as expected.
- */
-TEST_F(GraphicsComposerHidlTest, setDisplayBrightness) {
-    if (!mComposerClient->getDisplayBrightnessSupport(mPrimaryDisplay)) {
-        EXPECT_EQ(mComposerClient->setDisplayBrightness(mPrimaryDisplay, 0.5f), Error::UNSUPPORTED);
+    if (!brightnessSupport) {
+        EXPECT_EQ(mComposerClient->getRaw()->setDisplayBrightness(mPrimaryDisplay, 0.5f),
+                  Error::UNSUPPORTED);
         GTEST_SUCCEED() << "Brightness operations are not supported";
         return;
     }