Mark installable jars with installable: true

Most jars don't need to be installed on the device.  Instead of
using java_library and java_library_static to distinguish between
them make java_library and java_library_static identical and use
installable: true to identify the few jars that need to be dexed
and installed on the device.

Bug: 110885583
Test: m checkbuild
Change-Id: I579da7c1a712ec4fb49e288e7f3ab369cb75baf4

test-base/Android.bp

@@ -21,6 +21,7 @@
 // Also contains the com.android.internal.util.Predicate[s] classes.
 java_library {
     name: "android.test.base",
+    installable: true,
 
     srcs: ["src/**/*.java"],
 
@@ -42,6 +43,7 @@ java_library {
 // Also contains the com.android.internal.util.Predicate[s] classes.
 java_library {
     name: "legacy-test",
+    installable: true,
 
     sdk_version: "current",
     static_libs: ["android.test.base"],