Bump Java target from 1.7 to 1.8 in makefiles

Bug: 320294595
Test: m
Change-Id: I66f3ebf2d6979a8b033c2f475fa21bae26ca97cd
diff --git a/core/java_common.mk b/core/java_common.mk
index c1ccd1a..65feb15 100644
--- a/core/java_common.mk
+++ b/core/java_common.mk
@@ -10,9 +10,7 @@
 ## Java version
 ###########################################################
 # Use the LOCAL_JAVA_LANGUAGE_VERSION if it is set, otherwise
-# use one based on the LOCAL_SDK_VERSION. If it is < 24
-# pass "1.7" to the tools, if it is unset, >= 24 or "current"
-# pass "1.8".
+# use one based on the LOCAL_SDK_VERSION.
 #
 # The LOCAL_SDK_VERSION behavior is to ensure that, by default,
 # code that is expected to run on older releases of Android
@@ -25,9 +23,7 @@
     # Host modules always default to 1.9
     LOCAL_JAVA_LANGUAGE_VERSION := 1.9
   else
-    ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_1_8_SUPPORT)))
-      LOCAL_JAVA_LANGUAGE_VERSION := 1.7
-    else ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_1_9_SUPPORT)))
+    ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_1_9_SUPPORT)))
       LOCAL_JAVA_LANGUAGE_VERSION := 1.8
     else ifneq (,$(filter $(LOCAL_SDK_VERSION), $(TARGET_SDK_VERSIONS_WITHOUT_JAVA_11_SUPPORT)))
       LOCAL_JAVA_LANGUAGE_VERSION := 1.9